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  • The electromagnetic wave modulation based on single-frequency reflection in absorption with angle stability of hyperbolic metamaterials
    J. Opt. (IF 2.379) Pub Date : 2020-08-06
    Yu Ma and Haifeng Zhang

    In this paper, the hyperbolic metamaterials (HMs) based on the one-dimensional (1D) plasma photonic crystals is proposed, whose dielectric constant and group index can be obtained through the effective medium theory. By adopting an improved Thue–Morse sequence structure and using the transfer matrix method, the tunable single-frequency reflection in absorption (SFRA) with angle stability is achieved

    更新日期:2020-08-10
  • Simulation design of silicon based quantum well nanolaser based on surface plasmon polariton
    J. Opt. (IF 2.379) Pub Date : 2020-08-06
    Lin Yang, Liuhong Ma, Yinghui Zhong, Zhiyong Duan and Mengke Li

    We propose a silicon based quantum well nanolaser structure based on surface plasmon polariton (SPP). The InGaAs/InP multi-quantum well in this structure can be obtained by direct epitaxy growth in nanoscale V-grooved trenches on silicon substrate by the high aspect ratio trapping method; and through the deposition of the metal layer and dielectric layer to excite the property of the SPP. The finite

    更新日期:2020-08-10
  • Direct detection of gap mode plasmon resonances using attenuated total reflection-based tip-enhanced near-field optical microscopy
    J. Opt. (IF 2.379) Pub Date : 2020-08-06
    Alex L Heilman, Richard J Hermann and Michael J Gordon

    Resonant excitation of gap mode plasmons between an optical antenna tip and a thin metal film was studied over different tip-surface distance regimes using simultaneous detection of surface reflectance via attenuated total reflection, elastic (Rayleigh) scattering by the antenna tip, and Raman scattering from analytes in the tip-surface gap region. Finite difference time domain optical simulations

    更新日期:2020-08-10
  • Point-to-point compensation method for color coupling and imbalance in color-fringe pattern profilometry
    J. Opt. (IF 2.379) Pub Date : 2020-08-06
    Mingxiong Wu, Gaoxu Wu, Shengming Zhang, Yanxue Wu, Fei Liu and Naiji Fan

    Color-fringe pattern profilometry is widely developed for high-speed 3D shape measurement due to more information can be extracted through a single color pattern. However, previous researches show that the color coupling and imbalance of the system cause significant errors, which severely influence the accuracy of the color-fringe pattern profilometry. We proposed a point-to-point method to compensate

    更新日期:2020-08-10
  • High-order photon correlations through double Hanbury Brown–Twiss measurements
    J. Opt. (IF 2.379) Pub Date : 2020-08-06
    Yanqiang Guo, Lijing Wang, Yu Wang, Xin Fang, Tong Zhao, Xiaomin Guo and Tiancai Zhang

    We present an experimental technique that can accurately measure the high-order photon correlations of various light fields based on double Hanbury Brown–Twiss scheme. The system consists of four conventional binary response single-photon counting modules which are non-photon-number-resolving detectors. We theoretically analyze the effects of the experimental conditions on the high-order photon correlations

    更新日期:2020-08-10
  • Comparison of Lambert W function with Adomian decomposition method for wave propagation in saturable absorption medium
    J. Opt. (IF 2.379) Pub Date : 2020-08-03
    Gun Yeup Kim and Chong Hoon Kwak

    We present a comparative study to examine the performances of both the Lambert W function method and Adomian decomposition method (ADM) for solving the nonlinear optical beam propagations in a saturable absorption (SA) medium for two distinct SA models. The SA-I model describes a fast saturable absorber (in which the relaxation time is much shorter than the pulse duration of the incident laser beam

    更新日期:2020-08-04
  • Tunable dual-band amplitude modulation with a double epsilon-near-zero metasurface
    J. Opt. (IF 2.379) Pub Date : 2020-08-02
    Ali Forouzmand and Hossein Mosallaei

    In this paper, we demonstrate an electrically tunable double epsilon-near-zero (D-ENZ) metasurface by incorporating an ultra-thin indium-tin-oxide layer (≈ 5 nm) into an array of moderately-doped silicon (Si) nanobars. The D-ENZ phenomenon is achieved by accumulation and depletion of carrier densities in ITO and Si active layers under applying the external bias voltages. An active dual-band amplitude

    更新日期:2020-08-03
  • Near-infrared Fano resonance in asymmetric silicon metagratings
    J. Opt. (IF 2.379) Pub Date : 2020-07-30
    Chenyu Peng, Chuhuan Feng, Ji Xia, Christopher Yap and Guangya Zhou

    Recent progress on dielectric metasurfaces enables versatile flat optics designs including high-quality resonators. In this paper, we propose a high-quality resonator design based on asymmetric silicon metagratings in the near-infrared region. The design breaks the symmetry of a silicon subwavelength grating to manifest the dark mode of bound states in the continuum, resulting in a high-quality Fano

    更新日期:2020-07-31
  • Oblique illumination lateral shearing digital holographic microscopy
    J. Opt. (IF 2.379) Pub Date : 2020-07-30
    Yasaman Ganjkhani, Alejandro Calabuig, Giancarlo Pedrini and Ali-Reza Moradi

    In this paper we present oblique illumination lateral shearing digital holographic microscopy (OILS-DHM) to remove the overlapping information of one of the two wave-fronts forming the holograms and enhance the lateral resolution. Lateral shearing DHM as a self-referencing scheme makes use of the interference of the object beam with itself to form the hologram, and thus is a compact and simple technique

    更新日期:2020-07-31
  • Tuning the chiral edge states and unidirectional transmission by surface morphology of gyromagnetic photonic crystal
    J. Opt. (IF 2.379) Pub Date : 2020-07-30
    Zhen Li, Hui Ma, Rui-xin Wu and Guo-zhong Wu

    Though topologically protected one-way edge states are determined by the bulk mode of the magnetic photonic crystal (MPC), the edge profile can influence topological edge states and associated wave propagation since the waves at the states are localized at the edge of the photonic crystal. By truncating the honeycomb structured MPC at the same side but at different cuts, we show the MPC slab will present

    更新日期:2020-07-31
  • Nonlinear chiral molecular photonics using twisted light: hyper-Rayleigh and hyper-Raman optical activity
    J. Opt. (IF 2.379) Pub Date : 2020-07-29
    Kayn A Forbes

    Chiroptical and optical activity effects involve differential interactions between matter and light. Generally this involves chiral molecules absorbing or scattering right- and left-handed circularly polarized photons at different rates due to the chiroptical interplay of molecular and optical chirality. Laser light which propagates with a helical phase and twisted wavefront possesses optical orbital

    更新日期:2020-07-30
  • Ultra-fast vivid computational ghost imaging of still and moving objects by sweeping random patterns
    J. Opt. (IF 2.379) Pub Date : 2020-07-28
    Sajjad Rajabi-Ghaleh, Babak Olyaeefar, Reza Kheradmand and Sohrab Ahmadi-Kandjani

    A sweeping algorithm is introduced in conventional computational ghost-imaging as a method for improving image quality and reducing the shot number. In this method, the intensity of rows and columns in the generated random patterns are set as bright pixels. Since this sweeping is repeated one by one on each row and column, a constant shot number, equal to the sum of raw and column number, is pre-defined

    更新日期:2020-07-29
  • Controllable abrupt focusing of a ring Pearcey–Gaussian beam in nonlocally defocusing nonlinear media
    J. Opt. (IF 2.379) Pub Date : 2020-07-28
    Yuanqiang Peng, Ruifeng Chen, Xiaolin Wu, Qichang Ma and Weiyi Hong

    The dynamics of the inward-focusing ring Pearcey–Gaussian (PeG) beam are investigated in nonlocally defocusing nonlinear media. The propagation of inward-focusing ring PeG beams exhibits an anomalous abrupt focusing behavior, which is also controllable by carefully adjusting the degree of the nonlocality. Interestingly, the position of the focus spot changes exponentially with the amplitude of the

    更新日期:2020-07-29
  • Imaging quality enhancement in binary ghost imaging using the Otsu algorithm
    J. Opt. (IF 2.379) Pub Date : 2020-07-28
    Xuanpengfan Zou, Wei Tan, Xianwei Huang, Suqin Nan, Yanfeng Bai and Xiquan Fu

    A decline in imaging quality will occur when the sampling data of ghost imaging is recorded by binarization. Based on the Otsu binarization, a method named Otsu binary ghost imaging (OBGI) is proposed to enhance imaging quality. Both theoretical and experimental results show that, with an appropriate threshold value, OBGI can enhance imaging quality significantly when compared with ordinary binary

    更新日期:2020-07-29
  • Enhanced magnification factors in super-resolution imaging using stacked dual microspheres
    J. Opt. (IF 2.379) Pub Date : 2020-07-26
    Ji Zhou, Binglin Zeng, Shusheng Bi and Yuliang Wang

    Microsphere based super-resolution imaging is a promising approach to achieve enhanced optical imaging with an ordinary optical microscope. In this study, we propose a new approach to enhance magnification factor in microsphere based super-resolution imaging. In the method, two microspheres are stacked in serial along the axial direction to implement the primary and the secondary magnifications, which

    更新日期:2020-07-27
  • Study of polarization effects in phase-controlled multi-beam interference lithography towards the realization of sub-micron photonic structures
    J. Opt. (IF 2.379) Pub Date : 2020-07-26
    Swagato Sarkar, Krishnendu Samanta and Joby Joseph

    In this study, we theoretically demonstrate the effect of polarization in the realization of the submicron woodpile and chiral helix photonic structures formed through multi-beams interference in an umbrella geometry using a phase-only spatial light modulator (SLM). The polarization states of the interfering beams play a decisive role in the formation of submicron features when the requisite high interference

    更新日期:2020-07-27
  • Multichannel-coupled compressed ultrafast photography
    J. Opt. (IF 2.379) Pub Date : 2020-07-26
    Jiali Yao, Dalong Qi, Chengshuai Yang, Fengyan Cao, Yilin He, Pengpeng Ding, Chengzhi Jin, Yunhua Yao, Tianqing Jia, Zhenrong Sun and Shian Zhang

    Compressed ultrafast photography (CUP) is currently the fastest receive-only ultrafast imaging technique with snapshot. CUP can capture non-repetitive transient events through three-dimensional (3D) image reconstruction based on a compressed sensing (CS) algorithm. However, CUP is a lossy imaging technique via image encoding and decoding, so how to further improve the image reconstruction accuracy

    更新日期:2020-07-27
  • Low-crosstalk demodulating vortex beams by a combination of two partial-receiving apertures in free space
    J. Opt. (IF 2.379) Pub Date : 2020-07-26
    Xiaohui Wang, Yingxiong Song, Fufei Pang, Qianwu Zhang, Yingchun Li, Xinnian Guo, Liyun Zhuang, Yongfeng Ju, Xiaofeng HE and Yudong Yang

    In order to improve the performance of a communication system, a novel concept of low-crosstalk demodulating vortex beams by a combination of partial-receiving apertures (PRAs) is proposed. The corresponding theory analysis and simulations are performed for certifying the valid of the proposed concept in theory. A proof-of-concept experiment is also proposed and established to verity the feasibility

    更新日期:2020-07-27
  • Enhanced smoothing by spectral dispersion via insertion of complex coaxial vortex plate
    J. Opt. (IF 2.379) Pub Date : 2020-07-26
    Zheqiang Zhong, Hao Xiong, Zhan Sui and Bin Zhang

    An enhanced smoothing by spectral dispersion (SSD) scheme via the insertion of a complex coaxial vortex plate in the beamline is proposed. The complex coaxial vortex plate is comprised of an inner vortex plate that induces an azimuthal charge on the beam, and a surrounding vortex plate that induces an opposite charge on the beam. The surrounding vortex plate is supported by a base of same material

    更新日期:2020-07-27
  • Retrieval of non-sparse objects through scattering media beyond the memory effect
    J. Opt. (IF 2.379) Pub Date : 2020-07-26
    Meiling Zhou, Runze Li, Tong Peng, An Pan, Junwei Min, Chen Bai, Dan Dan and Baoli Yao

    Optical imaging through scattering media is commonly constrained to sparse objects and the optical memory effect. To solve the problems, a method based on the combination of ptychography and the shower-curtain effect is presented here to achieve the retrieval of non-sparse samples through scattering media beyond the memory effect. The phase disturbance introduced by scattering media can be neglected

    更新日期:2020-07-27
  • Revisit of generalized Kerker’s conditions using composite metamaterials
    J. Opt. (IF 2.379) Pub Date : 2020-07-23
    Rfaqat Ali

    Achieving zero backward scattering (ZBS) and zero forward scattering (ZFS), i.e. the so-called first and second Kerker’s conditions respectively, by sphere spherical particles is considered to be impossible due to the unavailability of naturally occurring magnetic materials in the visible frequency range. We report theoretical modeling to design composite metamaterials that present large optical magnetic

    更新日期:2020-07-24
  • Polarization-multiplexed metalens via spin-independent manipulation of spin–orbit interactions
    J. Opt. (IF 2.379) Pub Date : 2020-07-23
    Qinmiao Chen, Yan Li, Yi Liu and Yanhua Han

    Metasurfaces have demonstrated revolutionary capabilities in manipulating the polarization, phase, and amplitude of light. Pancharatnam–Berry (P–B) phase metasurfaces can operate over a broad spectrum and robust phase distributions against fabrication tolerance. However, the conjugated characteristic of the modulated phases for different spin photons introduces an obstacle for multifunctional photonics

    更新日期:2020-07-24
  • Bi-layered silicon metagratings for period tunability in the near-infrared region
    J. Opt. (IF 2.379) Pub Date : 2020-07-23
    Chenyu Peng, Chuhuan Feng, Qifeng Qiao, Christopher Yap and Guangya Zhou

    Period tunability of gratings is extremely desirable for reconfigurable optics. In this study, we report a period-tunable metagrating featuring a bi-layered structure of silicon subwavelength gratings to form a Moiré pattern. Our design is based on the near field Moiré effect and employs the leaky mode resonance to enhance the far-field diffraction. The period of the metagrating can be continuously

    更新日期:2020-07-24
  • Symmetric Ge 2 Sb 2 Te 5 based metamaterial absorber induced dynamic wide-gamut structural color
    J. Opt. (IF 2.379) Pub Date : 2020-07-23
    Guanghao Rui, Chuanchuan Ding, Bing Gu, Qiaoqiang Gan, Qiwen Zhan and Yiping Cui

    Plasmonic color has played a critical role for its applications in color printing and display owing to the advantages of high-resolution and durability. Recently, increasing attempts have been performed to actualize dynamic structural color. Here theoretically proposed is the generation of wide color gamut in symmetric Ge 2 Sb 2 Te 5 (GST) based metamaterial absorber. By introducing a periodic metallic

    更新日期:2020-07-24
  • Emergence of breathers in non-linear pulse compression
    J. Opt. (IF 2.379) Pub Date : 2020-07-23
    Amdad Chowdury, Trivikramarao Gavara and Wonkeun Chang

    We report on the universality of the emergence of Akhmediev breathers in soliton effect pulse compression dynamics by using explicit analytic solutions of breathers and solitons in the non-linear Schrödinger equation. We show that at maximum compression point, a higher-order soliton and a breather solution are equivalent with a nearly identical full-width at half maximum duration. From this, we demonstrate

    更新日期:2020-07-24
  • Potential opportunities of sawtooth diffraction microstructure with two layers and single relief
    J. Opt. (IF 2.379) Pub Date : 2020-07-20
    Greisukh Gregory Isaevich, Yezhov Yevgeniy Grigorievich, Antonov Artem Ivanovich, Danilov Viktor Anatolyevich and Usievich Boris Alexandrovich

    We present the estimated parameter ( Q factor) derived from scalar diffraction theory for a two-layer single-relief sawtooth diffraction microstructure comprising a pair of optical materials. The Q factor allows the negative effects that arise due to the nonlinearity of the difference in the refractive indices of optical materials to be evaluated. This parameter enables pairs of optical materials to

    更新日期:2020-07-21
  • Wannier–Mott excitons in GaSe single crystals
    J. Opt. (IF 2.379) Pub Date : 2020-07-20
    V V Zalamai, N N Syrbu, I G Stamov and S I Beril

    The absorption, reflection and photoluminescence spectra of GaSe crystals with different thicknesses (100 nm–1 mm) were investigated in a wide temperature interval (300 K–10 K). Features due to excitonic states in the spectra were recognized. The contours of the excitonic reflection spectra measured at 10 K were calculated by dispersion equations. On the basis of these calculations, the parameters

    更新日期:2020-07-21
  • Single-shot table-top coherent x-ray imaging with diffraction-limited resolution by nonlinear phase variations
    J. Opt. (IF 2.379) Pub Date : 2020-07-13
    Kyoung Hwan Lee, Hyeok Yun, Jae Hee Sung, Seong Ku Lee, Hwang Woon Lee, Hyung Taek Kim, A Depresseux, J Gautier, F Tissandier, J-P Goddet, S Sebban and Chang Hee Nam

    We demonstrated single-shot high-numerical-aperture coherent diffraction imaging (CDI) with a diffraction-limited resolution using table-top x-ray laser at 13.9 nm. In order to achieve the diffraction-limited resolution, a nonlinear phase variation was introduced in a sample so that an asymmetric diffraction pattern with clear visibility could be extended to high spatial frequencies. From the diffraction

    更新日期:2020-07-15
  • Inscription of surface waveguides in glass by femtosecond laser writing for enhanced evanescent wave overlap
    J. Opt. (IF 2.379) Pub Date : 2020-07-13
    Vítor A Amorim, João M Maia, Duarte Viveiros and P V S Marques

    Near-surface optical waveguides were fabricated in alkaline earth boro-aluminosilicate glass (Eagle2000), by femtosecond laser direct writing, using two distinct approaches. First, the capability of directly inscribing optical waveguides close to the surface was tested, and then, compared to the adoption of post writing wet etching to bring to the surface waveguides inscribed at greater depths. Laser

    更新日期:2020-07-15
  • Shaping photonic hook via well-controlled illumination of finite-size graded-index micro-ellipsoid
    J. Opt. (IF 2.379) Pub Date : 2020-07-09
    Cheng-Yang Liu, Hung-Ju Chung, Oleg V Minin and Igor V Minin

    In this work, we present an investigation of the process of photonic hook generation using mesoscale finite-size graded-index elliptical particle under illumination of limited space. The combination of illuminating beamwidth and polarization allows efficient beam shaping and directionality control of photonic hook. The switching of photonic hook is achieved by changing the graded-index of the elliptical

    更新日期:2020-07-10
  • Design of annulus-based dielectric metamaterial cloak with properties of illusion optics
    J. Opt. (IF 2.379) Pub Date : 2020-07-06
    Jian-Hui Lin, Ta-Jen Yen and Tsung-Yu Huang

    We propose a feasible design for an annulus-based dielectric metamaterial cloak to not only reduce Ohmic losses from metallic metamaterials but also avoid manual misalignment when utilizing discrete dielectric metamaterials. The designed cloak is authenticated by the finite-integration method, and the corresponding field distributions without and with hidden objects are found to reveal the invisibility

    更新日期:2020-07-07
  • Two-wave mixing in erbium-doped-fibers with spectral-hole burning at 77K
    J. Opt. (IF 2.379) Pub Date : 2020-07-06
    J Lopez, H Kerbertt, M Plata, E Hernandez and S Stepanov

    Experimental results on effective two-wave mixing (TWM) via dynamic population gratings in saturable erbium doped fibers (EDFs) at liquid nitrogen temperature (77 K) are reported. It is shown that formation of the spectral holes (SHs) by the recording coherent waves in the wavelength region 1500–1540 nm results in a complex dynamics of the transient TWM response. In addition to conventional slow, even-type

    更新日期:2020-07-07
  • Twin photonic hooks generated from two coherent illuminations of a micro-cylinder
    J. Opt. (IF 2.379) Pub Date : 2020-07-05
    Song Zhou

    Recently, twin photonic nanojets (t-PNJs) generated from two coherent illuminations of a single micro-cylinder have been emerging as a new research field in nanophotonics. Herein, we investigate the t-PNJs generation using a single micro-cylinder illuminated by two opposite polarized plane waves. The shape profiles of the t-PNJs are related to the angles of the incident waves, while twin photonic hooks

    更新日期:2020-07-06
  • Genetic algorithms for focusing inside opaque media
    J. Opt. (IF 2.379) Pub Date : 2020-07-05
    Benjamin R Anderson and Hergen Eilers

    We characterize the performance of standard and micro genetic algorithms when applied to focusing inside of an opaque media using feedback from a fluorescent guidestar particle. Using this feedback modality we find that the algorithms optimize more quickly (but to a lower enhancement) than when using reflective feedback, with the underlying mechanism being the fluorescence signal’s multimodal nature

    更新日期:2020-07-06
  • Investigation on Rashba spin–orbit interactions in two dimension quantum array for thermal imaging applications
    J. Opt. (IF 2.379) Pub Date : 2020-07-05
    M Solaimani and Alireza Mobini

    In this work, we investigated the optical properties of a two dimensional quantum array using tight binding method in the presence of the Rashba spin–orbit (RSOI) interaction. The results show that ribbon array has sharp peaks with maximum absorption up to 70 (arb. units), at the energy of 95 meV with FHWM of 48 meV that can be used in thermal imaging applications. We have studied the effect of structural

    更新日期:2020-07-06
  • Tunable and broadband coherent perfect absorbers with nonlinear and amplification performance based on asymmetric bifacial graphene metasurfaces
    J. Opt. (IF 2.379) Pub Date : 2020-07-01
    Tianjing Guo and Christos Argyropoulos

    We present an asymmetric bifacial graphene metasurface to realize tunable and broadband coherent perfect absorption (CPA) at terahertz (THz) frequencies. The proposed design is composed of two dissimilar graphene square patch metasurfaces stacked over an ultrathin dielectric substrate. Nonlinear CPA performance without resorting to optical nonlinearities and amplification are demonstrated based on

    更新日期:2020-07-03
  • Polarization rotation and singularity evolution of fundamental Poincaré beams through anisotropic Kerr nonlinearities
    J. Opt. (IF 2.379) Pub Date : 2020-07-01
    Bo Wen, Guanghao Rui, Jun He, Yiping Cui and Bing Gu

    We report a theoretical investigation on polarization rotation and singularity evolution of focused fundamental Poincaré beams in free-space propagation and through isotropic and anisotropic Kerr nonlinear media. It is found that the optical nonlinearity enhances the polarization rotation of the focused beams during propagation. Furthermore, the anisotropy of optical nonlinearity causes the symmetry

    更新日期:2020-07-03
  • Plasmonic and phononic properties of epitaxial conductive transition metal nitrides
    J. Opt. (IF 2.379) Pub Date : 2020-06-29
    M Gioti, J Arvanitidis, D Christofilos, K Chaudhuri, T Zorba, G Abadias, D Gall, V M Shalaev, A Boltasseva and P Patsalas

    The dielectric function, reflectivity and Raman spectra of several epitaxial transition metal nitride films (TiN, ZrN, NbN, TaN, MoN, WN) on MgO substrates are reported. Apart from WN, the studied films exhibit a negative real part of the dielectric function, and thus may sustain plasmonic resonances with varying quality factors and at diverse spectral regions. Epitaxial TiN and ZrN outperform the

    更新日期:2020-07-01
  • Facet-driven formation of axial and radial In(Ga)As clusters in GaAs nanowires
    J. Opt. (IF 2.379) Pub Date : 2020-06-29
    A Balgarkashi, S P Ramanandan, N Tappy, M Nahra, W Kim, L Güniat, M Friedl, N Morgan, D Dede, J B Leran, C Couteau and A Fontcuberta i Morral

    Embedding quantum dots in nanowires (NWs) constitutes one promising building block for quantum photonic technologies. Earlier attempts to grow InAs quantum dots on GaAs nanowires were based on the Stranski–Krastanov growth mechanism. Here, we propose a novel strain-driven mechanism to form 3D In-rich clusters on the NW sidewalls and also on the NW top facets. The focus is on ternary InGaAs nanowire

    更新日期:2020-07-01
  • Phase matching in β -barium borate crystals for spontaneous parametric down-conversion
    J. Opt. (IF 2.379) Pub Date : 2020-06-29
    Suman Karan, Shaurya Aarav, Homanga Bharadhwaj, Lavanya Taneja, Arinjoy De, Girish Kulkarni, Nilakantha Meher and Anand K Jha

    Spontaneous parametric down-conversion (SPDC) is the most widely used process for generating photon pairs entangled in various degrees of freedom such as polarization, time-energy, position-transverse momentum, and angle-orbital angular momentum (OAM). In SPDC, a pump photon interacts with a non-linear optical crystal and splits into two entangled photons called the signal and the idler photons. The

    更新日期:2020-07-01
  • Multi-wavelength phase-shifting interferometry based on a two-step phase-shifting phase retrieval algorithm with a color CMOS
    J. Opt. (IF 2.379) Pub Date : 2020-06-29
    Jinping Fan, Chunjun Li, Jingdan Zhang and Yingjie Cui

    By combining the advantages of multi-wavelength phase-shifting interferometry and two-step phase-shifting phase retrieval algorithm, a measured phase with high precision and a large measuring range can be retrieved rapidly from three multi-wavelength interferograms with unknown phase shifts, recorded by a single-chip color CMOS. Firstly, two normalized differential interferograms without backgrounds

    更新日期:2020-06-30
  • Single photon generation and non-locality of perfect W-state
    J. Opt. (IF 2.379) Pub Date : 2020-06-29
    Manoranjan Swain, Amit Rai, M Karthick Selvan and Prasanta K Panigrahi

    We study the generation of a single photon perfect W-state. An important aspect of this perfect W-state is that it can be used for perfect teleportation and superdense coding, which are not achievable with maximally entangled W-state. Our scheme for generation involves entanglement between various path degrees of freedom of a single photon in a compact and weakly coupled integrated waveguide system

    更新日期:2020-06-30
  • Modeling spectral correlations of photon-pairs generated in liquid-filled photonic crystal fibers
    J. Opt. (IF 2.379) Pub Date : 2020-06-29
    Lorena Velázquez-Ibarra, Antonio Díez, Enrique Silvestre, Miguel V Andrés and J L Lucio

    The generation of photon-pairs with controllable spectral correlations is crucial in quantum photonics. Here we present the design of a photonic crystal fiber to generate widely-spaced four-wave mixing bands with spectral correlations that can be tuned through the thermo-optic effect after being infiltrated with heavy water. We present a theoretical study of the purity of the signal and idler photons

    更新日期:2020-06-30
  • Non-polar nitride single-photon sources
    J. Opt. (IF 2.379) Pub Date : 2020-06-24
    Tong Wang, Rachel A Oliver and Robert A Taylor

    Non-polar nitride single-photon sources are developed in order to minimise the undesired side effects caused by the internal fields of polar nitrides, while retaining the benefits of high-temperature single-photon generation from a semiconductor quantum dot platform. As a relatively newer single-photon source, several reports have already been made highlighting their interesting optical and photophysical

    更新日期:2020-06-25
  • Mode-dependent crosstalk and detection probability of orbital angular momentum of optical vortex beam through atmospheric turbulence
    J. Opt. (IF 2.379) Pub Date : 2020-06-24
    Lihong Zhang, Feng Shen, Bin Lan and Ao Tang

    The crosstalk of orbital angular momentum (OAM) modes is one of the most important issues for free-space optical communication. We theoretically derive a crosstalk model for Laguerre–Gaussian (LG) vortex beams propagating in turbulent atmosphere. The calculated crosstalk of different OAM modes in different turbulence by analytical expression is consistent with experimental measurements. Both theoretical

    更新日期:2020-06-25
  • High-resolution (diffraction limited) single-shot multiplexed coded-aperture ptychography
    J. Opt. (IF 2.379) Pub Date : 2020-06-24
    Gil Ilan Haham, Or Peleg, Pavel Sidorenko and Oren Cohen

    We propose and numerically explore a method that upgrades a conventional single-shot microscope into a single-shot ptychographic microscope, without impairing its optical performance. It is based on splitting the microscope’s intermediate image plane into multiple replicas, and detecting a set of their coded Fourier transform magnitudes, using a different sensor for each replica. To code each beam

    更新日期:2020-06-25
  • The effect of astigmatism induced by refraction on the orbital angular momentum of light
    J. Opt. (IF 2.379) Pub Date : 2020-06-21
    Atirach Ritboon

    We use the Fourier transform and Snell’s law to demonstrate how refraction at a flat interface induces astigmatism and transforms the spatial distribution of a stigmatic beam. Refraction makes the beam parameters for the transverse dimensions perpendicular and parallel to the plane of incidence grow differently and gives rise astigmatism. The decompositions of the orbital angular momentum of the beam

    更新日期:2020-06-23
  • Classical antennas, quantum emitters, and densities of optical states
    J. Opt. (IF 2.379) Pub Date : 2020-06-21
    William L Barnes, Simon A R Horsley and Willem L Vos

    We provide a pedagogical introduction to the concept of the local density of optical states (LDOS), illustrating its application to both the classical and quantum theory of radiation. We show that the LDOS governs the efficiency of a macroscopic classical antenna, determining how the antenna’s emission depends on its environment. The LDOS is shown to similarly modify the spontaneous emission rate of

    更新日期:2020-06-23
  • The role of normal polarization in far-field subwavelength imaging by a dielectric microsphere or microcylinder
    J. Opt. (IF 2.379) Pub Date : 2020-06-21
    R Heydarian and C R Simovski

    The role of normal polarization in far-field subwavelength imaging granted by a dielectric microsphere or microcylinder is revealed. Two hypotheses explaining this imaging are suggested. One of these hypotheses is confirmed by exact numerical simulations. It is an efficient excitation of a set of creeping waves at a curved dielectric interface by a normally polarized dipole. After their emission from

    更新日期:2020-06-23
  • Tailored radially self-accelerating beams
    J. Opt. (IF 2.379) Pub Date : 2020-06-21
    Christian Vetter, Andrew Forbes and Alexander Szameit

    Radially self-accelerating beams are rotating shape-invariant solutions of the Helmholtz equation. As such, they exhibit continuous indefinitely spiraling trajectories. Here we present the possibility to tailor those beams to achieve almost any desired beam cross section, without sacrificing the unique propagation characteristics. We discuss analytical tailoring opportunities and highlight their inherent

    更新日期:2020-06-23
  • Random number generation and distribution out of thin (or thick) air
    J. Opt. (IF 2.379) Pub Date : 2020-06-21
    N Bornman, A Forbes and A Kempf

    Much scientific work has focused on the generation of random numbers as well as the distribution of said random numbers for use as a cryptographic key. However, emphasis is often placed on one of the two to the exclusion of the other, but both are often simultaneously important. Here we present a simple hybrid free-space link scheme for both the generation and secure distribution of (pseudo-)random

    更新日期:2020-06-23
  • A noise-robust multi-intensity phase retrieval method based on structural patch decomposition
    J. Opt. (IF 2.379) Pub Date : 2020-06-21
    Feilong Zhang, Cheng Guo, Yulan Zhai, Jiubin Tan, Shutian Liu, Cuimei Tan, Hang Chen and Zhengjun Liu

    Multi-image iterative parallel phase retrieval methods are widely used in measurement and imaging, due to their simplicity and effectiveness. However, the retrieved image will have foggy diffuse noise, since some unknown cross-talk factors exist in iterative calculation. In this paper, a new updated method is embedded into the calculation process of phase retrieval. The iterative strategy of phase

    更新日期:2020-06-23
  • Transport mean free path tensor and anisotropy tensor in anisotropic diffusion equation for optical media
    J. Opt. (IF 2.379) Pub Date : 2020-06-21
    Sang Eon Han

    We derive the anisotropic diffusion equation for optical random media from the radiative transfer equation by correcting errors or eliminating simplifications in previous studies. The derived equation makes explicit the relation between microscopic (extinction cross-section and phase function) and macroscopic (transport mean free path tensor) parameters. We discover that transmittance and reflectance

    更新日期:2020-06-23
  • An equivalent incident light model for multiple scattering and polarization neutral point of skylight
    J. Opt. (IF 2.379) Pub Date : 2020-06-16
    Wang Jue, Qian Jianqiang and Guo Lei

    The symmetry breaking in the skylight polarization pattern is caused by the shape of the atmosphere and multi-scattering. We analyzed the physical processes of multi-scattering and found out that when neutral points split from two into four there should be an altitude shift of the center of polarization pattern. The altitude shift could be positively related to the split angle of the neutral point

    更新日期:2020-06-17
  • Controlled flow of nonlinear surface plasmon polaritons
    J. Opt. (IF 2.379) Pub Date : 2020-06-16
    I V Dzedolik and A Yu Leksin

    The control of flow of surface plasmon polaritons (SPPs) propagating at the single interface of metal and dielectric media and also in plasmonic waveguides is considered. The SPP energy flux is sufficient for appearance of the nonlinear polarization of the media. SPP flow propagates along the interface as a quasiharmonic wave in the linear regime at weak intensity and as a cnoidal wave in the form

    更新日期:2020-06-17
  • Image reconstruction using different speckles and methods
    J. Opt. (IF 2.379) Pub Date : 2020-06-16
    Panghe Qiu, Xin Liu, Ying Huo, Bo Su, Jing Ding and Jingsuo He

    Ghost imaging (GI) is an imaging method that uses photon correlation for image restoration. In this study, we design two different color speckle fields and use a digital light projector to display them onto a color object that is measured by a single-pixel photodetector. The first is uniformly distributed with red, green, and blue colors, while patterns are generated through linear mapping of a Hadamard

    更新日期:2020-06-17
  • Building-up and suppression of cladding mode coupling in fiber Bragg gratings
    J. Opt. (IF 2.379) Pub Date : 2020-06-09
    Hongye Li, Xiaofan Zhao, Binyu Rao, Meng Wang and Zefeng Wang

    The building-up and suppression of cladding-mode coupling in UV exposure fiber Bragg gratings (FBGs) is investigated experimentally and theoretically. Experimental results reveal that fundamental mode can simultaneously couple to cladding modes from different groups in the un-tilted FBGs as the transmission spectrum takes on multilevel. Theoretical results indicate that due to the non-uniform refractive

    更新日期:2020-06-09
  • Light pulse propagation in a double prism layout close to the angle of total internal reflection
    J. Opt. (IF 2.379) Pub Date : 2020-06-09
    A V Turchin and M V Vasnetsov

    Both transmission and reflection of a short light pulse are considered for a double prism system in the geometry of in-gap refraction with an account of material dispersion. Within a frame of linear optics and Snell refraction law, we revealed the effect of a ‘negative dispersion’ regime close to the total internal reflection. A narrow area of parameters (wave number and angle of incidence) in the

    更新日期:2020-06-09
  • Analysis on light power and three-dimentional temperature distribution characteristics of gain guided and index alternate-guided fiber lasers
    J. Opt. (IF 2.379) Pub Date : 2020-06-09
    Xiao Shen, Liaolin Zhang, Jianyong Ding and Wei Wei

    Gain guided and index alternate-guided (GGIA-G) fiber was suggested by our group recently. In this work, the improved rate equations of the GGIA-G fiber laser were established and solved. The pump and signal light power distribution along the fiber longitudinal axis were simulated under the conditions of forward, backward and bidirectional pump. Furthermore, a theoretical three-dimensional temperature

    更新日期:2020-06-09
  • Nonlinear optical absorption properties of tellurium glasses containing different network modifiers
    J. Opt. (IF 2.379) Pub Date : 2020-06-08
    Gökhan Bilir, Mustafa Yüksek, Ahmet Karatay and Ayhan Elmalı

    Linear- and nonlinear-optical absorption and carrier dynamic properties of binary tellurite glasses modified with different amount of WO 3 , Nb 2 O 5 , and ZnO were investigated via UV–Vis spectrophotometer, open aperture Z-scan and pump-probe techniques. Glasses were synthesized using conventional melt quenching technique. The vitreous nature of the samples were confirmed by conducting XRD measurements

    更新日期:2020-06-08
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