-
Terahertz magneto-optical metadevice for active spin-selective beam steering and energy distribution with nonreciprocal isolation Optica (IF 10.4) Pub Date : 2023-09-29 Dan Zhao, Fei Fan, Jiayue Liu, Zhiyu Tan, Hao Wang, Qinghui Yang, Qiye Wen, and Shengjiang Chang
Active beam steering and energy distribution have important applications for terahertz (THz) communication, radar, and imaging. However, the spin-conjugated mirror symmetry of a passive Pancharatnam–Berry (PB) metasurface limits the active energy distribution. Here, we prepared a low dispersion, low loss, and high magneto-optical coefficient La:YIG single crystal, ±45∘ Faraday rotation angle that can
-
Er-doped silica fiber laser made by powder-based additive manufacturing Optica (IF 10.4) Pub Date : 2023-09-27 Pawel Maniewski, Martin Brunzell, Laura Barrett, Clarissa M. Harvey, Valdas Pasiskevicius, and Fredrik Laurell
The pursuit of advanced fiber laser technologies has driven research toward unconventional manufacturing techniques. In this work, we present an erbium-doped fiber laser made using powder-based additive manufacturing. An Er3+/Al3+ co-doped silica glass rod was printed using laser powder deposition and then used as the core material in a fiber preform. The fiber drawn from the preform exhibited the
-
All-glass miniature GHz repetition rate femtosecond laser cavity Optica (IF 10.4) Pub Date : 2023-09-25 Antoine Delgoffe, Saood Nazir, Sargis Hakobyan, Clemens Hönninger, and Yves Bellouard
Free-space optics allows for design freedom and control, but miniaturization and manufacturability are limited. Here, we present a method for manufacturing complex miniaturized free-space optical systems that combines contactless femtosecond laser-activated alignment with femtosecond laser 3D manufacturing of a substrate incorporating optomechanical elements. Specifically, we demonstrate a palm-sized
-
Asymmetric phase modulation of light with parity-symmetry broken metasurfaces Optica (IF 10.4) Pub Date : 2023-09-27 Elena Mikheeva, Rémi Colom, Karim Achouri, Adam Overvig, Felix Binkowski, Jean-Yves Duboz, Sébastien Cueff, Shanhui Fan, Sven Burger, Andrea Alù, and Patrice Genevet
The design of wavefront-shaping devices is conventionally approached using real-frequency modeling. However, since these devices interact with light through radiative channels, they are by default non-Hermitian objects having complex eigenvalues (poles and zeros) that are marked by phase singularities in a complex frequency plane. Here, by using temporal coupled mode theory, we derive analytical expressions
-
2.2 kW single-mode narrow-linewidth laser delivery through a hollow-core fiber Optica (IF 10.4) Pub Date : 2023-09-22 M. A. Cooper, J. Wahlen, S. Yerolatsitis, D. Cruz-Delgado, D. Parra, B. Tanner, P. Ahmadi, O. Jones, Md. S. Habib, I. Divliansky, J. E. Antonio-Lopez, A. Schülzgen, and R. Amezcua Correa
Antiresonant hollow-core fibers (AR-HCFs) have opened up exciting possibilities for high-energy and high-power laser delivery because of their exceptionally low nonlinearities and high damage thresholds. While these fiber designs offer great potential for handling kilowatt-class powers, it is crucial to investigate their performance at multi-kW power levels. Until now, transmission of narrow-linewidth
-
Spectral speckle customization Optica (IF 10.4) Pub Date : 2023-09-22 Nicholas Bender, Henry Haig, Demetrios N. Christodoulides, and Frank W. Wise
Speckle patterns are used in a broad range of applications including microscopy, imaging, and light–matter interactions. Tailoring speckles’ statistics can dramatically enhance their performance in applications. We present an experimental technique for customizing the spatio-spectral speckled intensity statistics of optical pulses at the output of a complex medium (a disordered multimode fiber) by
-
High-coherence hybrid-integrated 780 nm source by self-injection-locked second-harmonic generation in a high-Q silicon-nitride resonator Optica (IF 10.4) Pub Date : 2023-09-19 Bohan Li, Zhiquan Yuan, Warren Jin, Lue Wu, Joel Guo, Qing-Xin Ji, Avi Feshali, Mario Paniccia, John E. Bowers, and Kerry J. Vahala
Visible, high-coherence optical sources are important to a wide range of applications spanning spectroscopy to precision timing. Integration of these sources on a semiconductor chip is a necessary step if the systems that use these devices are to be made compact, portable, and low power. Here, by self-injection-locking a 1560 nm distributed feedback semiconductor laser to a high-Q silicon-nitride resonator
-
High-fidelity ptychographic imaging of highly periodic structures enabled by vortex high harmonic beams Optica (IF 10.4) Pub Date : 2023-09-20 Bin Wang, Nathan J. Brooks, Peter Johnsen, Nicholas W. Jenkins, Yuka Esashi, Iona Binnie, Michael Tanksalvala, Henry C. Kapteyn, and Margaret M. Murnane
Ptychographic coherent diffractive imaging enables diffraction-limited imaging of nanoscale structures at extreme ultraviolet and x-ray wavelengths, where high-quality image-forming optics are not available. However, its reliance on a set of diverse diffraction patterns makes it challenging to use ptychography to image highly periodic samples, limiting its application to defect inspection for electronic
-
3D zeros in electromagnetic fields Optica (IF 10.4) Pub Date : 2023-09-19 Alex J. Vernon, Mark R. Dennis, and Francisco J. Rodríguez-Fortuño
We present a study of 3D electromagnetic field zeros, uncovering their remarkable characteristic features and propose a classifying framework. These are a special case of general dark spots in optical fields, which sculpt light’s spatial structure into matter-moving, information-rich vortices, escape the diffraction limit for single-molecule imaging, and can trap particles for nanoscale manipulation
-
Diffraction-gated real-time ultrahigh-speed mapping photography Optica (IF 10.4) Pub Date : 2023-09-14 Xianglei Liu, Patrick Kilcullen, Youmin Wang, Brandon Helfield, and Jinyang Liang
Single-shot high-speed mapping photography is a powerful tool used for studying fast dynamics in diverse applications. Despite much recent progress, existing methods are still strained by the trade-off between sequence depth and light throughput, errors induced by parallax, limited imaging dimensionality, and the potential damage caused by pulsed illumination. To overcome these limitations, we explore
-
Azimuthal backflow in light carrying orbital angular momentum Optica (IF 10.4) Pub Date : 2023-09-11 Bohnishikha Ghosh, Anat Daniel, Bernard Gorzkowski, and Radek Lapkiewicz
M. V. Berry’s work [J. Phys. A 43, 415302 (2010) [CrossRef] ] highlighted the correspondence between backflow in quantum mechanics and superoscillations in waves. Superoscillations refer to situations where the local oscillation of a superposition is faster than its fastest Fourier component. This concept has been used to experimentally demonstrate backflow in transverse linear momentum for optical
-
Photonic molecule based on coupled ring quantum cascade lasers Optica (IF 10.4) Pub Date : 2023-09-08 Sara Kacmoli, Deborah L. Sivco, and Claire F. Gmachl
Photonic molecules—particular systems composed of coupled optical resonators—emulate the behavior of complex physical systems exhibiting discrete energy levels. In this work, we present a photonic molecule composed of two strongly coupled, mid-infrared ring quantum cascade lasers. We explore both experimentally and numerically the key features of the photonic molecule such as the energy level splitting
-
Cold damping of levitated optically coupled nanoparticles Optica (IF 10.4) Pub Date : 2023-09-07 Vojtěch Liška, Tereza Zemánková, Vojtěch Svak, Petr Jákl, Jan Ježek, Martin Bránecký, Stephen H. Simpson, Pavel Zemánek, and Oto Brzobohatý
Methods for controlling the motion of single particles, optically levitated in vacuum, have developed rapidly in recent years. The technique of cold damping makes use of feedback-controlled, electrostatic forces to increase dissipation without introducing additional thermal fluctuations. This process has been instrumental in the ground-state cooling of individual electrically charged nanoparticles
-
Double spiral resonant MEMS scanning for ultra-high-speed miniaturized optical microscopy Optica (IF 10.4) Pub Date : 2023-09-06 Linyang Li, Xiao Liang, Wei Qin, Heng Guo, Weizhi Qi, Tian Jin, Jianbo Tang, and Lei Xi
Micro–electro–mechanical systems (MEMS)-based optical scanners play a vital role in the development of miniaturized optical imaging modalities. However, there is a longstanding challenge to balance the temporal resolution, field of view (FOV), and systematic fidelity. Here, we propose a double spiral scanning mechanism to enable high-frequency resonant scanning of MEMS scanners without sacrificing
-
Cavity-enhanced scalable integrated temporal random-speckle spectrometry Optica (IF 10.4) Pub Date : 2023-09-06 Hongnan Xu, Yue Qin, Gaolei Hu, and Hon Ki Tsang
Chip-scale integrated spectrometers have many prospective applications, such as in situ biochemical analysis, optical coherence tomography, and remote hyperspectral sensing. Most reported monolithically integrated spectrometers support spectral resolutions of 101−102pm with 102−103 wavelength channels. In this work, we propose and demonstrate a scalable integrated spectrometer that achieves ultrahigh
-
Quantum-inspired superresolution for incoherent imaging Optica (IF 10.4) Pub Date : 2023-09-06 Xiao-Jie Tan, Luo Qi, Lianwei Chen, Aaron J. Danner, Pakorn Kanchanawong, and Mankei Tsang
Optical measurements that can achieve the fundamental quantum limits have the potential to improve the imaging of subdiffraction objects in important applications, including optical astronomy and fluorescence microscopy. Working towards the goal of implementing such quantum-inspired measurements for real applications, we experimentally demonstrate the localization of two incoherent optical point sources
-
Deterministic vortices evolving from partially coherent fields Optica (IF 10.4) Pub Date : 2023-09-01 Wenrui Miao, Yongtao Zhang, and Greg Gbur
Optical vortices—lines of zero intensity around which the field phase has a circulating or helical structure—have become important tools for many applications such as imaging, trapping, and communications. It has long been assumed, however, that there is an intrinsic conflict between optical vortices and partial coherence, in that a vortex is a deterministic phase structure, and a partially coherent
-
Scalable low-latency optical phase sensor array Optica (IF 10.4) Pub Date : 2023-08-29 Zhanghao Sun, Sunil Pai, Carson Valdez, Maziyar Milanizadeh, Andrea Melloni, Francesco Morichetti, David A. B. Miller, and Olav Solgaard
Optical phase measurement is critical for many applications, and traditional approaches often suffer from mechanical instability, temporal latency, and computational complexity. In this paper, we describe compact phase sensor arrays based on integrated photonics, which enable accurate and scalable reference-free phase sensing in a few measurement steps. This is achieved by connecting multiple two-port
-
Interferometric phase stability from Gaussian and space–time light sheets Optica (IF 10.4) Pub Date : 2023-08-24 Mbaye Diouf, Zixi Lin, Mitchell Harling, Krishangi Krishna, and Kimani C. Toussaint
The incredible phase sensitivity of Michelson interferometry has made it useful for a variety of metrology and sensing applications with the trade-off that it is also vulnerable to unwanted fluctuations in the sensing environment. Here, we demonstrate that Michelson interferometry using either Gaussian or space–time (ST) light sheets results in enhanced passive phase stability. Our experiments are
-
Efficiency-boosted semiconductor optical amplifiers via mode-division multiplexing Optica (IF 10.4) Pub Date : 2023-08-24 Yi Wang, Yihui Wei, Victor Dolores-Calzadilla, Daoxin Dai, Kevin Williams, Meint Smit, and Yuqing Jiao
Semiconductor optical amplifiers (SOAs) are a fundamental building block for many photonic systems. However, their power inefficiency has been setting back operational cost reduction, circuit miniaturization, and the realization of more complex photonic functions such as large-scale switches and optical phased arrays. In this work, we demonstrate significant gain and efficiency enhancement using an
-
Passive superresolution imaging of incoherent objects Optica (IF 10.4) Pub Date : 2023-08-22 Jernej Frank, Alexander Duplinskiy, Kaden Bearne, and A. I. Lvovsky
The need to observe objects that are smaller than the diffraction limit has led to the development of various superresolution techniques. However, most such techniques require active interaction with the sample, which may not be possible in multiple practical scenarios. The recently developed technique of Hermite–Gaussian imaging (HGI) achieves superresolution by passively observing the light coming
-
Wigner function tomography via optical parametric amplification Optica (IF 10.4) Pub Date : 2023-08-22 Mahmoud Kalash and Maria V. Chekhova
Wigner function tomography is indispensable for characterizing quantum states, but its commonly used version, balanced homodyne detection, suffers from several weaknesses. First, it requires efficient detection, which is critical for measuring fragile non-Gaussian states, especially bright ones. Second, it needs a local oscillator, tailored to match the spatiotemporal properties of the state under
-
Single-photon detection for long-range imaging and sensing Optica (IF 10.4) Pub Date : 2023-08-21 Robert H. Hadfield, Jonathan Leach, Fiona Fleming, Douglas J. Paul, Chee Hing Tan, Jo Shien Ng, Robert K. Henderson, and Gerald S. Buller
Single-photon detectors with picosecond timing resolution have advanced rapidly in the past decade. This has spurred progress in time-correlated single-photon counting applications, from quantum optics to life sciences and remote sensing. A variety of advanced optoelectronic device architectures offer not only high-performance single-pixel devices but also the ability to scale up to detector arrays
-
Natural exceptional points in the excitation spectrum of a light–matter system Optica (IF 10.4) Pub Date : 2023-08-14 A. Opala, M. Furman, M. Król, R. Mirek, K. Tyszka, B. Seredyński, W. Pacuski, J. Szczytko, M. Matuszewski, and B. Piętka
In this work, we observe natural exceptional points in the excitation spectrum of an exciton–polariton system by optically tuning the light–matter interactions. The observed exceptional points do not require any spatial or polarization degrees of freedom and result solely from the transition from weak to strong light–matter coupling. It was demonstrated that they do not coincide with the threshold
-
Mollow triplets under few-photon excitation Optica (IF 10.4) Pub Date : 2023-08-15 Bang Wu, Xu-Jie Wang, Li Liu, Guoqi Huang, Wenyan Wang, Hanqing Liu, Haiqiao Ni, Zhichuan Niu, and Zhiliang Yuan
Resonant excitation is an essential tool in the development of semiconductor quantum dots (QDs) for quantum information processing. One central challenge is to enable transparent access to the QD signal without post-selection information loss. A viable path is through cavity enhancement, which has successfully lifted the resonantly scattered field strength over the laser background under weak excitation
-
Frequency noise of laser gyros Optica (IF 10.4) Pub Date : 2023-08-10 Antonio Mecozzi
Laser gyros are powerful tools used to test the predictions of the general theory of relativity. The precision of a measurement of the rotation rate with a laser gyro is limited by the frequency noise of the beat between two counterpropagating modes of a ring laser. The frequency noise of a single mode of a laser is limited by quantum mechanical constraints because it is related to the maximum precision
-
Generation of squeezed quantum microcombs with silicon nitride integrated photonic circuits Optica (IF 10.4) Pub Date : 2023-08-09 Mandana Jahanbozorgi, Zijiao Yang, Shuman Sun, Haoran Chen, Ruxuan Liu, Beichen Wang, and Xu Yi
A two-mode squeezed microresonator-based frequency comb is demonstrated with CMOS-compatible silicon nitride integrated photonic circuits. Seventy quantum modes, in a span of 1.3 THz, are generated in an integrated Kerr microresonator at telecommunication wavelengths.
-
Metasurface reflector enables room-temperature circularly polarized emission from VCSEL Optica (IF 10.4) Pub Date : 2023-08-08 Xiangli Jia, Jonas Kapraun, Jiaxing Wang, Jipeng Qi, Yipeng Ji, and Connie Chang-Hasnain
While most lasers are linearly polarized, circularly polarized laser sources are crucial components for many optical applications such as biosensing, quantum technologies, and AR/VR. However, conventional methods for generating chiral light have limitations in device miniaturization. Vertical-cavity surface-emitting lasers (VCSELs), with their small footprint and surface emission feature, can be integrated
-
Efficient Monte Carlo simulation of spatiotemporal speckles and their correlations Optica (IF 10.4) Pub Date : 2023-08-04 Chen Bar, Ioannis Gkioulekas, and Anat Levin
When viewed under coherent illumination, scattering materials such as tissue exhibit highly varying speckle patterns. Despite their noise-like appearance, the temporal and spatial variations of these speckles, resulting from internal tissue dynamics and/or external perturbation of the illumination, carry strong statistical information that is highly valuable for tissue analysis. The full practical
-
Reduced rank photonic computing accelerator Optica (IF 10.4) Pub Date : 2023-08-04 Samarth Aggarwal, Bowei Dong, Johannes Feldmann, Nikolaos Farmakidis, Wolfram H. P. Pernice, and Harish Bhaskaran
Use of artificial intelligence for tasks such as image classification and speech recognition has started to form an integral part of our lives. Facilitation of such tasks requires processing a huge amount of data, at times in real time, which has resulted in a computation bottleneck. Photonic cores promise ultra-fast convolutional processing by employing broadband optical links to perform parallelized
-
Universal mask for hard x rays Optica (IF 10.4) Pub Date : 2023-08-03 David Ceddia, Alaleh Aminzadeh, Philip K. Cook, Daniele Pelliccia, Andrew M. Kingston, and David M. Paganin
The penetrating power of x rays underpins important applications such as medical radiography. However, this same attribute makes it challenging to achieve flexible on-demand patterning of x-ray beams. One possible path to this goal is “ghost projection,” a method that may be viewed as a reversed form of classical ghost imaging. This technique employs multiple exposures of a single illuminated non-configurable
-
Cooling colors below ambient temperature Optica (IF 10.4) Pub Date : 2023-08-03 Wanlin Wang, Hongyun Xing, Xiaochi Shu, Xinkun Zhao, Xiaoyuan Yan, Binbin Hong, Lei Sun, Wang Zhang, and Guo Ping Wang
The colors of objects originate from reflection of light in certain directions and absorption of undesired light, producing substantial heating. Extensive efforts are expended to cool colorful objects to reduce their energy consumption. However, a strategy to cool colorful objects below ambient temperature while fully preserving their excellent color properties with high saturation and large viewing
-
Three-dimensional coherent diffraction snapshot imaging using extreme-ultraviolet radiation from a free electron laser Optica (IF 10.4) Pub Date : 2023-08-02 Danny Fainozzi, Matteo Ippoliti, Fulvio Bille, Dario De Angelis, Laura Foglia, Claudio Masciovecchio, Riccardo Mincigrucci, Matteo Pancaldi, Emanuele Pedersoli, Christian M. Günther, Bastian Pfau, Michael Schneider, Clemens Von Korff Schmising, Stefan Eisebitt, George Kourousias, Filippo Bencivenga, and Flavio Capotondi
The possibility of obtaining a three-dimensional (3D) representation of a single object with sub-µm resolution is crucial in many fields, from material science to clinical diagnostics. This is typically achieved through tomography, which combines multiple 2D images of the same object captured with different orientations. However, this serial imaging method prevents single-shot acquisition in imaging
-
Modeless Raman fiber laser Optica (IF 10.4) Pub Date : 2023-07-31 Yanxin Li, Jiancheng Deng, Ming Shen, Peiyun Cheng, and Xuewen Shu
The discrete multi-longitudinal mode structure and temporal periodic fluctuation are the intrinsic features of conventional lasers. However, longitudinal mode spacing limits the maximum resolution in high-resolution laser sensing systems. In addition, temporal periodic fluctuation reduces the security of secure communication and deteriorates the randomness in fast physical random bit generation. Therefore
-
Attosecond metrology in circular polarization Optica (IF 10.4) Pub Date : 2023-07-31 Meng Han, Jia-Bao Ji, Kiyoshi Ueda, and Hans Jakob Wörner
Attosecond metrology with linearly polarized light pulses is the basis of a highly successful research area. An even broader impact can be expected from a generalized metrology that covers two-dimensional polarization states, enabling notably the study of chiroptical phenomena on the electronic time scale. Here, we introduce and demonstrate a comprehensive approach to the generation and complete characterization
-
Transient light shift register mechanism of bi-chromatic pulse generation Optica (IF 10.4) Pub Date : 2023-07-28 Boris Nyushkov, Aleksey Ivanenko, Sergey Smirnov, and Sergey Turitsyn
Primary methods for generating short pulses in lasers require intracavity elements or physical mechanisms for modulation or the saturable absorption of radiation. This often complicates laser design and limits capabilities, particularly beyond single-wavelength operation. We propose and explore a method for the synchronous generation of bicolor, high-repetition-rate pulses that combines stimulated
-
Super-resolved total internal reflection fluorescence microscopy using random illuminations Optica (IF 10.4) Pub Date : 2023-07-27 Kévin Affannoukoué, Simon Labouesse, Guillaume Maire, Laurent Gallais, Julien Savatier, Marc Allain, Md Rasedujjaman, Loic Legoff, Jérôme Idier, Renaud Poincloux, Florence Pelletier, Christophe Leterrier, Thomas Mangeat, and Anne Sentenac
A benefit of random illumination microscopy (RIM) is that it improves the resolution and linearity of the brightness of structured illumination microscopy using minimally controlled speckled illumination. Here, we implemented RIM in the total internal reflection fluorescence (TIRF) configuration for imaging biological processes close to the coverslip surface. Using standard TIRF objectives, we separated
-
Thermodynamically limited uncooled infrared detector using an ultra-low mass perforated subwavelength absorber Optica (IF 10.4) Pub Date : 2023-07-27 Avijit Das, Merlin L. Mah, John Hunt, and Joseph J. Talghader
An uncooled detector has reached the thermodynamic temperature fluctuation limit, such that 98% of its total noise consisted of phonon and photon fluctuations of the detector body. The device has performed with a detectivity of 3.8×109cm√Hz/W , which is the highest reported for any room temperature device operating in the long-wave infrared (λ∼8−12µm ). The device has shown a noise-equivalent temperature
-
Accelerated deep self-supervised ptycho-laminography for three-dimensional nanoscale imaging of integrated circuits Optica (IF 10.4) Pub Date : 2023-07-26 Iksung Kang, Yi Jiang, Mirko Holler, Manuel Guizar-Sicairos, A. F. J. Levi, Jeffrey Klug, Stefan Vogt, and George Barbastathis
Three-dimensional inspection of nanostructures such as integrated circuits is important for security and reliability assurance. Two scanning operations are required: ptychographic to recover the complex transmissivity of the specimen, and rotation of the specimen to acquire multiple projections covering the 3D spatial frequency domain. Two types of rotational scanning are possible: tomographic and
-
Chip-scale frequency combs for data communications in computing systems Optica (IF 10.4) Pub Date : 2023-07-25 Yoshitomo Okawachi, Bok Young Kim, Michal Lipson, and Alexander L. Gaeta
Recent developments in chip-based frequency-comb technology demonstrate that comb devices can be implemented in applications where photonic integration and power efficiency are required. The large number of equally spaced comb lines that are generated make combs ideal for use in communication systems, where each line can serve as an optical carrier to allow for massively parallel wavelength-division
-
Estimation of a parameter encoded in the modal structure of a light beam: a quantum theory Optica (IF 10.4) Pub Date : 2023-07-25 Manuel Gessner, Nicolas Treps, and Claude Fabre
Quantum light is described not only by a quantum state but also by the shape of the electromagnetic modes on which the state is defined. Optical precision measurements often estimate a “mode parameter” that determines properties such as frequency, temporal shape, and the spatial distribution of the light field. By deriving quantum precision limits, we establish the fundamental bounds for mode parameter
-
Experimental demonstration of a nanolaser with a sub-µA threshold current Optica (IF 10.4) Pub Date : 2023-07-24 Evangelos Dimopoulos, Meng Xiong, Aurimas Sakanas, Andrey Marchevsky, Gaoneng Dong, Yi Yu, Elizaveta Semenova, Jesper Mørk, and Kresten Yvind
We demonstrate a nano-buried-heterostructure photonic crystal laser exhibiting an ultralow threshold of 730 nA at telecom wavelengths. This breakthrough was achieved by reducing the doping-induced losses of the laser cavity, enabling the efficient miniaturization of the active region. The laser can be directly modulated at 3 GHz at an energy cost of 1 fJ/bit, and a comparison to longer lasers is given
-
Effective electromagnetic wave properties of disordered stealthy hyperuniform layered media beyond the quasistatic regime Optica (IF 10.4) Pub Date : 2023-07-24 Jaeuk Kim and Salvatore Torquato
Disordered stealthy hyperuniform dielectric composites exhibit novel electromagnetic wave transport properties in two and three dimensions. Here, we carry out the first study of the electromagnetic properties of one-dimensional 1D) disordered stealthy hyperuniform layered media. From an exact nonlocal theory, we derive an approximation formula for the effective dynamic dielectric constant tensor εe(kq
-
Nonlinear integrated quantum photonics with AlGaAs Optica (IF 10.4) Pub Date : 2023-07-18 F. Baboux, G. Moody, and S. Ducci
Integrated photonics provides a powerful approach for developing compact, stable, and scalable architectures for the generation, manipulation, and detection of quantum states of light. To this end, several material platforms are being developed in parallel, each providing its specific assets, and hybridization techniques to combine their strengths are available. This review focuses on AlGaAs, a III–V
-
Modeling off-axis diffraction with the least-sampling angular spectrum method Optica (IF 10.4) Pub Date : 2023-07-19 Haoyu Wei, Xin Liu, Xiang Hao, Edmund Y. Lam, and Yifan Peng
Accurately yet efficiently simulating off-axis diffraction is vital to design large-scale computational optics, but existing rigid sampling and modeling schemes fail to address this. Herein, we establish a universal least-sampling angular spectrum method that enables efficient off-axis diffraction modeling with high accuracy. Specifically, by employing the Fourier transform’s shifting property to convert
-
Deep learning enhanced fast fluorescence lifetime imaging with a few photons Optica (IF 10.4) Pub Date : 2023-07-18 Dong Xiao, Natakorn Sapermsap, Yu Chen, and David Day Uei Li
We present a deep learning (DL) framework, termed few-photon fluorescence lifetime imaging (FPFLI), for fast analysis of fluorescence lifetime imaging (FLIM) data under highly low-light conditions with only a few photons per pixel. FPFLI breaks the conventional pixel-wise lifetime analysis paradigm and fully exploits the spatial correlation and intensity information of fluorescence lifetime images
-
Observation of colossal terahertz magnetoresistance and magnetocapacitance in a perovskite manganite Optica (IF 10.4) Pub Date : 2023-07-18 Fuyang Tay, Swati Chaudhary, Jiaming He, Nicolas Marquez Peraca, Andrey Baydin, Gregory A. Fiete, Jianshi Zhou, and Junichiro Kono
Terahertz (THz) magnetoresistance effects have been extensively investigated and have shown promising results for applications in magnetic modulations of the amplitude of THz waves. However, THz magnetocapacitance in dielectric systems, which is essential for phase modulations of THz radiation, remains largely unexplored. Here, we study the THz response of a bulk single crystal of La0.875Sr0.125MnO3
-
Quantum-enhanced phase imaging without coincidence counting Optica (IF 10.4) Pub Date : 2023-07-19 A. Nicholas Black, Long D. Nguyen, Boris Braverman, Kevin T. Crampton, James E. Evans, and Robert W. Boyd
Quantitative phase imaging provides a way to image transparent objects, such as biological cells, and measure their thickness. We report on a phase-imaging method that achieves twice the phase shift and approximately 1.7 times the spatial resolution of an equivalent spatially and temporally coherent classical quantitative phase-imaging system by using quantum interference between successive spontaneous
-
Increased dose efficiency of breast CT with grating interferometry Optica (IF 10.4) Pub Date : 2023-07-18 Michał Rawlik, Alexandre Pereira, Simon Spindler, Zhentian Wang, Lucia Romano, Konstantins Jefimovs, Zhitian Shi, Maxim Polikarpov, Jinqiu Xu, Marie-Christine Zdora, Stefano van Gogh, Martin Stauber, Eduardo G. Yukihara, Jeppe B. Christensen, Rahel A. Kubik-Huch, Tilo Niemann, Cornelia Leo, Zsuzsanna Varga, Andreas Boss, and Marco Stampanoni
Refraction-based x-ray imaging can overcome the fundamental contrast limit of computed tomography (CT), particularly in soft tissue, but so far has been constrained to high-dose ex vivo applications or required highly coherent x-ray sources, such as synchrotrons. Here we demonstrate that grating interferometry (GI) is more dose efficient than conventional CT in imaging of human breast under close-to-clinical
-
Pulse-resolved beam position measurements of high energy X-ray pulses at MHz rate with a diamond sensor Optica (IF 10.4) Pub Date : 2023-07-21 Tuba Çonka Yıldız, Wolfgang Freund, Jia Liu, Michal Pomorski, and Jan Grünert
The European X-ray Free Electron Laser facility produces extremely intense and short X-ray pulses. A diamond sensor proposed for non-invasive diagnostics of hard X-rays enables pulse-resolved beam position measurements within less than 1% uncertainty at 2.25MHz .
-
Clamped and sideband-resolved silicon optomechanical crystals Optica (IF 10.4) Pub Date : 2023-07-12 Johan Kolvik, Paul Burger, Joey Frey, and Raphaël Van Laer
Optomechanical crystals (OMCs) are a promising and versatile platform for transduction between mechanical and optical fields. However, the release from the substrate used in conventional suspended OMCs also complicates manufacturing and severely reduces thermal anchoring. This may be improved by attaching the OMCs directly to the substrate. Previous work towards such clamped, i.e., non-suspended, OMCs
-
Non-sliced optical arbitrary waveform measurement (OAWM) using soliton microcombs Optica (IF 10.4) Pub Date : 2023-07-12 Daniel Drayss, Dengyang Fang, Christoph Füllner, Grigory Lihachev, Thomas Henauer, Yung Chen, Huanfa Peng, Pablo Marin-Palomo, Thomas Zwick, Wolfgang Freude, Tobias J. Kippenberg, Sebastian Randel, and Christian Koos
Comb-based optical arbitrary waveform measurement (OAWM) techniques can overcome the bandwidth limitations of conventional coherent detection schemes, thereby enabling ultra-broadband signal acquisition in a wide range of scientific and industrial applications. For efficient and robust implementation of such OAWM systems, miniaturization into chip-scale form factors is key. In this paper, we propose
-
Laser-amplified nonvolatile charge trapping effect in semiconductor quantum dot structures Optica (IF 10.4) Pub Date : 2023-07-12 Yuhong Cao, Kang’an Jiang, Zhuyikang Zhao, and Hui Wang
Optoelectronic memory is attracting tremendous attention as an emerging strategy to emulate the human visual system. However, most devices to date focus on converting visual information in real time, rarely meeting the expectation of memorizing that information. Here, we report the discovery of a light-induced nonvolatile trapping effect that shows remarkable long-term storage of optical signals in
-
High-power lasing at ∼900 nm in Nd3+-doped fiber: a direct coordination engineering approach to enhance fluorescence Optica (IF 10.4) Pub Date : 2023-07-12 Yinggang Chen, Zhiquan Lin, Hongtao Sun, Yafei Wang, Hehe Dong, Meng Wang, Lei Zhang, Guoping Dong, Xiaofeng Liu, Fei Yu, Shikai Wang, Chunlei Yu, and Lili Hu
Lasers at ∼900nm have been of vital importance in various fields, including material processing, underwater communications, and strong-field physics. Although Nd3+ -doped materials have been employed for the ∼900nm laser, the ∼900nm emission is in strong competition with the often more dominating ∼1060nm emission, which strongly limits the output power and applications. This paper proposes a direct
-
Azimuthal confinement: the missing ingredient in understanding confinement loss in antiresonant, hollow-core fibers Optica (IF 10.4) Pub Date : 2023-06-30 Leah R. Murphy and David Bird
Antiresonant, hollow-core optical fibers are currently challenging or even exceeding the loss performance of conventional solid-core fibers. Despite this progress, there are aspects of the guidance mechanism in these fibers that are still not understood. For example, a physical mechanism to explain why negative curvature of the core surround is correlated with low loss remains elusive. It is shown
-
X-ray phase-contrast microtomography of soft tissues using a compact laboratory system with two-directional sensitivity Optica (IF 10.4) Pub Date : 2023-06-30 Carlos Navarrete-León, Adam Doherty, Savvas Savvidis, Mattia F. M. Gerli, Giovanni Piredda, Alberto Astolfo, David Bate, Silvia Cipiccia, Charlotte K. Hagen, Alessandro Olivo, and Marco Endrizzi
X-ray microtomography is a nondestructive, three-dimensional inspection technique applied across a vast range of fields and disciplines, ranging from research to industrial, encompassing engineering, biology, and medical research. Phase-contrast imaging extends the domain of application of x-ray microtomography to classes of samples that exhibit weak attenuation, thus appearing with poor contrast in
-
Universal visible emitters in nanoscale integrated photonics Optica (IF 10.4) Pub Date : 2023-06-30 G. Spektor, D. Carlson, Z. Newman, J. L. Skarda, N. Sapra, L. Su, S. Jammi, A. R. Ferdinand, A. Agrawal, J. Vučković, and S. B. Papp
Visible wavelengths of light control the quantum matter of atoms and molecules and are foundational for quantum technologies, including computers, sensors, and clocks. The development of visible integrated photonics opens the possibility for scalable circuits with complex functionalities, advancing both science and technology frontiers. We experimentally demonstrate an inverse design approach based
-
High orbital angular momentum lasing with tunable degree of chirality in a symmetry-broken microcavity Optica (IF 10.4) Pub Date : 2023-06-29 Zhen Qiao, Zhiyi Yuan, Song Zhu, Chaoyang Gong, Yikai Liao, Xuerui Gong, Munho Kim, Dawei Zhang, and Yu-Cheng Chen
Chiral lasers with orbital angular momenta (OAM) are building blocks in developing high-dimensional integrated photonic devices. However, it remains demanding to arbitrarily manipulate the precise degree of chirality (DOC) and quantum numbers of OAM in microscale lasers. This study reports a strategy to generate OAM microlasers with tunable DOCs and large quantum numbers through a ring-structured Fabry–Perot
-
Full control of electric and magnetic light–matter interactions through a nanomirror on a near-field tip Optica (IF 10.4) Pub Date : 2023-06-28 Benoît Reynier, Eric Charron, Obren Markovic, Xingyu Yang, Bruno Gallas, Alban Ferrier, Sébastien Bidault, and Mathieu Mivelle
Light–matter interactions are often considered governed by the electric optical field only, leaving aside the magnetic component of light. However, the magnetic part plays a determining role in many optical processes, from light and chiral-matter interactions and photon-avalanching to forbidden photochemistry, making the manipulation of magnetic processes extremely relevant. Here, by creating a standing
-
Scaling comb-driven resonator-based DWDM silicon photonic links to multi-Tb/s in the multi-FSR regime Optica (IF 10.4) Pub Date : 2023-06-23 Aneek James, Asher Novick, Anthony Rizzo, Robert Parsons, Kaylx Jang, Maarten Hattink, and Keren Bergman
The use of chip-based micro-resonator Kerr frequency combs in conjunction with dense wavelength-division multiplexing (DWDM) enables massively parallel intensity-modulated direct-detection data transmission with low energy consumption. Resonator-based modulators and filters used in such systems can limit the number of usable wavelength channels due to practical constraints on the maximum achievable