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Toward measurements of the speed-dependence of line-mixing J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-04 Christian Boulet; Jean-Michel Hartmann
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N2-, O2- and Air-broadened half-widths and line shifts of methyl chloride in the 10 µm region J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-04 O. Ben Fathallah; L. Manceron; N. Dridi; M. Rotger; H. Aroui
N2- and O2-broadening coefficients were measured at room temperature for 2914 ro-vibrational lines of methyl chloride in the region from 920 to 1140 cm−1 corresponding to the ν6 band, using a high-resolution Fourier transform spectrometer and a mono-spectrum non-linear least squares fitting of Voigt profiles. The spectra were recorded at the AILES beamline of the SOLEIL Synchrotron facility at various
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FTIR laboratory measurement of He I spectra in the 6.5–14 μm spectral range: transitions involving f, g, h, and i states J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-15 S. Civiš; P. Kubelík; E.M. Zanozina; A. Pastorek; V.E. Chernov; M. Ferus; Ashok Chilukoti; A.V. Naskidashvili
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First high–resolution analysis of the 3ν4, ν2+2ν4 and 2ν2+ν4 bands of 76GeH4 J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-13 O.N. Ulenikov; O.V. Gromova; E.S. Bekhtereva; N.I. Raspopova; I.A. Velmuzhova; M.A. Koshelev; P.G. Sennikov
The infrared spectrum of germane, purified and enriched up to 88.1 % of 76GeH4, was measured at the temperature of (22.6±0.1)∘C with a Bruker Fourier transform infrared spectrometer IFS125HR and analyzed in the region of 2350 – 2730 cm−1 where the bending tetrad of the ro–vibrational octad of germane is located. The 2955 transitions belonging to the thirteen sub–bands of the Tetrad were assigned and
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Rovibrationally resolved radiative lifetime and collisional cross section measurements of the 61Σg+(v=6,8,J=31) state of molecular sodium J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-19 Dinesh Wagle; Lok R. Pant; Joseph Converse; Scott Wenner; Ziya Saglam; S. Burcin Bayram
We report on radiative lifetime and collisional cross section measurements of the Na2 61Σg+(v=6, J=31) and 61Σg+(v=8, J=31) molecular levels by time-resolved laser spectroscopy. The excitation to the 61Σg+(3s+5s) electronic state was achieved using two synchronized pulsed lasers, directed to the sodium heatpipe oven and molecular fluorescence decay time as a function of buffer gas was recorded via
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Quantitative analysis of ro–vibrational spectra of ethylene: Line strengths of the ν12 and ν3 bands of 12C2H2D2-cis J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-13 O.N. Ulenikov; E.S. Bekhtereva; O.V. Gromova; Yu.V. Konova; Yu.S. Aslapovskaya; C. Sydow; K. Berezkin; S. Bauerecker
For the 12C2H2D2-cis molecule a line strength analysis of 1473/400 transitions of the ν12/ν3 bands was performed by the fit of their line shapes with the Hartmann–Tran profile. Ten effective dipole moment parameters (six parameters for the ν12 band and four parameters for the ν3 band) were obtained from the weighted fit which reproduce the initial experimental 1473 transition strengths of the ν12 band
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Viruses such as SARS-CoV-2 can be partially shielded from UV radiation when in particles generated by sneezing or coughing: Numerical simulations J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-24 David C. Doughty; Steven C. Hill; Daniel W. Mackowski
UV radiation can inactivate viruses such as SARS-CoV-2. However, designing effective UV germicidal irradiation (UVGI) systems can be difficult because the effects of dried respiratory droplets and other fomites on UV light intensities are poorly understood. Numerical modeling of UV intensities inside virus-containing particles on surfaces can increase understanding of these possible reductions in UV
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MATLAB package for discrete dipole approximation by graphics processing unit: Fast Fourier Transform and Biconjugate Gradient J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-02 M. Shabaninezhad; M.G. Awan; G. Ramakrishna
A MATLAB package describing discrete dipole approximation (MPDDA) is introduced to calculate the optical properties of arbitrary shaped plasmonic nanoparticles (NPs). The polarizability function, induced dipoles, and dipole interaction matrix are discussed. To calculate the dipole moments, Fast Fourier Transform (FFT) and Biconjugate Gradient (BCG) were used to reduce the computational time and memory
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Polarization resolved radiation angular patterns of orientationally ordered nanorods J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-05 Alexei D. Kiselev
We combine the transfer matrix based algebraic approach with the Green’s function method to theoretically study polarization resolved far-field angular distributions of photoluminescence from quantum nanorods (NRs) embedded in an optically anisotropic film. The emission and excitation properties of NRs are described by the emission and excitation anisotropy tensors. These tensors and the solution of
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Transverse Kerker scattering governed by two nondegenerate electric dipoles and its application in arbitrary beam steering J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-07 M.Q. Liu; C.Y. Zhao; H. Bao
In this work, we propose and demonstrate that transverse Kerker scattering (TKS), previously achieved relying on simultaneous excitation of electric dipole (ED), magnetic dipole (MD), electric and magnetic quadrupoles, can also be simply realized via only two nondegenerate EDs in two-dimensional cylindrical structures. The principle indicates that, the TKS can be achieved as if two EDs oscillate antiphase
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Comparison of equations used to estimate soot agglomerate absorption efficiency with the Rayleigh-Debye-Gans approximation J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-14 Magín Lapuerta; Sofía González-Correa; Francisco Cereceda-Balic; Hans Moosmüller
The contribution of soot aerosols to radiative forcing and climate change depends on their optical properties. Since these aerosols are agglomerates composed of quasi-spherical primary particles (usually small with respect to the radiation wavelength), their properties can be calculated following the Rayleigh-Debye-Gans approximation, which considers primary particles as independent absorbers and scatterers
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Time-Resolved Fourier Transform Infrared Emission Spectroscopy of CO ∆v = 1 and ∆v = 2 Extended Bands in the Ground X1Σ+ State Produced by Formamide Glow Discharge J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-14 Adam Pastorek; Svatopluk Civiš; Victoria H.J. Clark; Sergei N. Yurchenko; Martin Ferus
This paper presents an extension to our knowledge of ∆v = 1 and ∆v = 2 bands of carbon monoxide in the ground state, measured by Fourier transform infrared spectroscopy of glow discharge of formamide-nitrogen mixture. Lines in declared bands are measured up to v = 30 for ∆v = 1 and up to v = 24 for ∆v = 2 band, by use of both InSb and MCT detectors, which have not been measured in the laboratory before
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Extended calculations of energy levels, radiative properties, and lifetimes for P-like Ge XVIII J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-05 Kai Wang; Xiao Han Zhang; Chun Yu Zhang; Wei Dang; Xiao Hui Zhao; Zhan Bin Chen; Ran Si; Chong Yang Chen; Jun Yan
Using the multiconfiguration Dirac-Hartree-Fock (MCDHF) and the relativistic configuration interaction (RCI) methods, a consistent set of transition energies and radiative transition data for the lowest 150 states of the 3s23p3, 3s3p4, 3s23p23d, 3s3p33d, 3p5, and 3s23p3d2 configurations in P-like Ge XVIII is provided. To assess the accuracy of the MCDHF transition energies, we have also performed calculations
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Light transfer through semi-transparent glass panes supporting pendant droplets J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-24 Eylul Simsek; Keyong Zhu; Glareh N. Kashanchi; Megan J. Williams; Tiphaine Galy; Michal Marszewski; Sarah H. Tolbert; Laurent Pilon
This paper quantifies experimentally the effect of pendant droplets condensed on the back of semi-transparent glass panes on their normal-hemispherical transmittance and reflectance in the visible and near-infrared. To enable sample characterization and ensure repeatability, acrylic droplets were deposited on the back side of 3 mm-thick soda-lime silicate glass slabs with or without hydrophobic surface
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Theoretical study on the electronic structure of NaS including spin-orbit coupling J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-13 Yadong Liu; Rui Li; Yahong Liu; Yong Liu; Jianlei Xue; Bing Yan
The 19 Λ-S states and the low-lying Ω states of NaS molecule are computed by using the multireference configuration method (MRCI) including spin-orbit coupling (SOC), core-valence correlation (CV), scalar relativistic effects and Davidson (+Q) correction. The potential energy curves (PECs), spectroscopic constants and dipole moments are obtained. The predissociation mechanism of A2Σ+ is investigated
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On transverse radiation pressure cross-sections in the generalized Lorenz–Mie theory and their numerical relationship with the dipole theory of forces J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-12 Leonardo A. Ambrosio; Gérard Gouesbet
The Rayleigh limit of the generalized Lorenz–Mie theory (GLMT) and its relationship with the dipole theory of forces is investigated for transverse radiation pressure cross-sections and optical forces exerted over very small particles. If, at one hand, the GLMT provides interesting insights in terms of a multipole expansion and becomes restricted to contributions from (n=1)-partial waves, on the other
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Assessing the properties of a colloidal suspension with the aid of deep learning J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-26 Tomasz Jakubczyk; Daniel Jakubczyk; Andrzej Stachurski
Convolution neural networks were applied to classify speckle images generated from nanoparticle suspensions and thus to recognise suspensions. The speckle images in the form of movies were obtained from suspensions placed in a thin cuvette. The classifier was trained, validated and tested on both single component monodispersive suspensions, as well as on two-component suspensions. It was able to properly
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Electronically tunable near-field radiative heat transfer between doped silicon and graphene-covered silicon dioxide J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-28 Wenwen Liang; Zhiheng Zheng; Lei Wang; Wei Yu
The key to the micro/nanoscale thermal management of precision instruments is flexibly controlling the heat flux in the near-field following the actual demand. In this paper, a near-field radiative thermal switch (NFRTS) made of the n-type doped silicon (D-Si) and graphene-covered silicon dioxide (SiO2) plates is proposed to achieve the active near-field radiative heat transfer modulation. The radiative
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Validation of spectroscopic data in the 1.27 µm spectral region by comparisons with ground-based atmospheric measurements J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-26 D.D. Tran; T. Delahaye; R. Armante; J.-M. Hartmann; D. Mondelain; A. Campargue; H. Fleurbaey; J.T. Hodges; H. Tran
Various spectroscopic data for absorption lines due to the magnetic dipole transitions of the a1Δg−X3Σg−(0−0) band of O2 centered at 1.27 µm are tested by comparison with high-resolution ground-based atmospheric measurements recorded by Fourier Transform Spectrometers at Park Falls and Caltech (USA). This band is of importance for atmospheric remote sensing since it will be used (together with the
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Layer detection algorithm for CALIPSO observation based on automatic segmentation with a minimum cost function J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-27 Feiyue Mao; Mengdi Zhao; Wei Gong; Liuzhu Chen; Zhenxing Liang
CALIPSO (cloud-aerosol lidar and infrared pathfinder satellite observation) provides unique opportunities for profiling global cloud and aerosol. It is crucial to accurately detect the boundaries of cloud and aerosol layers from CALIPSO observation because the detecting error will be passed to further retrieval. Considered superior to other layer detection methods, the threshold method is the core
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Development of ZJU high-spectral-resolution lidar for aerosol and cloud: Feature detection and classification J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-06 Nanchao Wang; Xue Shen; Da Xiao; Igor Veselovskii; Chuanfeng Zhao; Feitong Chen; Chong Liu; Yuhang Rong; Ju Ke; Binyu Wang; Dong Liu
A ground-based high-spectral-resolution lidar (HSRL), operated at 532 nm wavelength, has been developed at Zhejiang University (ZJU) for aerosols and clouds studies. This lidar provides vertical profiles of aerosol scattering ratio together with lidar ratio and particle depolarization ratio at 532 nm. These single wavelength HSRL observations can be used to automatically identify the features attributed
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Trapping two types of Rayleigh particles simultaneously by a focused rotational elliptical Laguerre-Gaussian correlated Schell-model beam J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-12 Bo Yang; Yahong Chen; Fei Wang; Yangjian Cai
We analyze the optical radiation forces, produced by a focused rotational elliptical Laguerre-Gaussian correlated Schell-model (ELGSM) beam, on the dielectric particles of different refractive indices in the Rayleigh scattering regime. It is found that through a judicious modulation of the initial spatial coherence width and the beam order of the correlation function of the rotational ELGSM beam, the
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Ammonia line strengths and N2-, O2-, Ar-, He-, and self-broadening coefficients in the v2 band near 10.4 µm J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-10 Sulaiman A. Alturaifi; Eric L. Petersen
Scanning-wavelength laser absorption measurements were carried out to determine the line strengths and broadening coefficients due to collisions of N2, O2, Ar, He, and NH3 for 12 ammonia transitions in the Q-branch of the v2 fundamental band near 10.4 µm. The measurements were conducted at 296 K using a high-resolution quantum cascade laser and span the frequency range of 957.5–963.0 cm−1. The absorption
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Polarized observations for advanced atmosphere-ocean algorithms using airborne multi-spectral hyper-angular polarimetric imager J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-10 Ahmed El-Habashi; Jeffrey Bowles; Robert Foster; Deric Gray; Malik Chami
Airborne measurements of the linear polarization state of light were carried out over coastal and open ocean conditions to study aerosol and water column properties and investigate the possibility of using a multi-spectral, hyper-angular imaging polarimeter for retrieving aerosol and hydrosol optical properties. The instrument, the Versatile Imager for the Coastal Ocean (VICO), is used to support the
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A polarized scanning nephelometer for measurement of light scattering of an ensemble-averaged matrix of aerosol particles J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-26 Qiang Hu; Zhenwei Qiu; Jin Hong; Dihu Chen
A new instrument, the Polarized Scanning Nephelometer (PSN), has been developed for measuring the complete scattering matrix of aerosol particles as a function of the scattering angle. The instrument measures directly the ensemble-averaged scattering matrix elements of the aerosol particles and can deduce all scattering matrix elements for scattering angles in the range 3.5° to 170° at two different
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The foreign-continuum absorption of water vapour in the far-infrared (50–500 cm−1) J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-07 Aleksandra O. Koroleva; Tatyana A. Odintsova; Mikhail Yu. Tretyakov; Olivier Pirali; Alain Campargue
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Viral Infected Cells Reveal Distinct Polarization Behavior; A Polarimetric Microscopy Analysis on HSV Infected Vero and HeLa cells J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-06 Saeed Amiri; Mitra Abedini; Saeedesadat Badieyan; Maryam Vaezjalali; Omid Akhavan; Pezhman Sasanpour
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The absorption spectrum of nitrous oxide between 8325 and 8622 cm−1 J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2021-01-04 E.V. Karlovets; S. Kassi; S.A. Tashkun; A. Campargue
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Addendum to figs. 10 and 11 in “Clear-sky shortwave downward flux at the earth's surface: Ground-based data vs. satellite-based data” [J. quant. spectrosc. radiat. transfer 224 (2019) 247-260] J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-24 Taiping Zhang; Paul W. Stackhouse; Stephen J. Cox; J. Colleen Mikovitz; Charles N. Long
While the CERES input aerosol optical depth and precipitable water data are continuously available, the same parameters derived from BSRN site measurements are available only intermittently. Cloudiness disrupts the aerosol optical depth (AOD) retrieval and precipitable water (w) observation sampling. Irregularly sampled records, such as these, can cause systematic biases if the averages of the continuous
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Applying orbital multi-angle photopolarimetric observations to study properties of aerosols in the Earth's atmosphere: Implications of measurements in the 1.378 µm spectral channel to retrieve microphysical characteristics and composition of stratospheric aerosols J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-17 Janna M. Dlugach; Michael I. Mishchenko; Oleksandr A. Veles
We analyze the possibilities of orbital photopolarimetric measurements to study properties of aerosols in the Earth's atmosphere. As an example, we consider the case when such measurements are performed within a narrow spectral channel centered at 1.378 µm that allows to retrieve microphysical characteristics of stratospheric aerosols separately from those of tropospheric aerosols. We consider the
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Finite series algorithm design for lens-focused Laguerre–Gauss beams in the generalized Lorenz–Mie theory J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-31 Luiz Felipe Votto; Leonardo Ambrosio; Gérard Gouesbet; Jiajie Wang
In continuation to a series of works on the elaboration of Finite Series (FS) methods for helical beams under the Generalized Lorenz–Mie Theory’s formalism, this paper consists of a thorough study of the mathematical and computational nuances which arise from implementing the recently deduced FS method for Lens–Focused Laguerre–Gaussian beams. This family of beams, as in most brought under the FS procedure
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Light extinction spectroscopy applied to polystyrene colloids: Sensitivity to complex refractive index uncertainties and to noise J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-25 Pinar Eneren; Yunus Tansu Aksoy; Yanshen Zhu; Erin Koos; Maria Rosaria Vetrano
The measurement of particle size distribution (PSD) in colloids and nanofluids presents many challenges, especially when it requires to be conducted in-situ and real-time. Our work aims to assess the capabilities of Light Extinction Spectroscopy (LES) technique to determine concentration and volumetric PSD (vPSD) of colloids and nanofluids. Numerical simulations are performed to verify robustness of
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A discrete integral transform for rapid spectral synthesis J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-13 D.C.M. van den Bekerom; E. Pannier
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Generalized Lorenz–Mie theory of photonic wheels J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-30 S. Orlov; J. Berškys
Plane light waves can carry angular momentum which is usually longitudinal (i.e. oriented along the axis of propagation). However, in confined (focused) light waves it can be oriented transversely (or perpendicular to the direction of propagation). Such electromagnetic fields therefore are called ‘photonic wheels’. We create photonic wheels with an aplanatic system and expand them into vector spherical
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Validity of the effective medium theory for modeling near-field thermal emission by nanowire arrays J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-16 Saman Zare; Ramin Pouria; Sheila Edalatpour
Nanowire arrays are promising man-made materials for tuning the spectrum and the magnitude of near-field thermal radiation. Near-field radiative properties of nanowire arrays are often studied using the effective medium theory (EMT). In this paper, we inspect the validity of the Maxwell-Garnett (MG) and Bruggeman (BR) EMTs for predicting near-field thermal emission by quartz and indium tin oxide (ITO)
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Simulations of optical forces by a microstructured continuous superposition of first-order nonparaxial Bessel beams on Rayleigh particles J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-16 Vinicius Soares de Angelis; Leonardo André Ambrosio; Michel Zamboni Rached
This paper investigates optical forces on absorptive Rayleigh particles produced by a nondiffracting microstructured vectorial beam (micrometer Frozen Wave) designed from a continuous superposition of first-order Bessel beams, very adaptive to highly nonparaxial conditions. Carrying a non null topological charge and possessing a vector nature, these beams have both orbit and spin angular momentum.
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Lidar observations of the upper atmospheric nickel layer at Beijing (40∘N,116∘E) J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-09 Fuju Wu; Haorang Zheng; Yong Yang; Xuewu Cheng; Faquan Li; Lifang Du; Jihong Wang; Jing Jiao; John M.C. Plane; Wuhu Feng; Guotao Yang
Ni atoms, produced in the Earth's upper atmosphere by meteoric ablation, are challenging to measure by lidar because the Ni atom density is low, the resonance scattering cross section is relatively small, and the transitions occur in the near-UV around 340 nm where absorption by the stratospheric ozone layer starts to become significant. A new Ni lidar has been designed and deployed at Yanqing station
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Aerosol light extinction and backscattering: A review with a lidar perspective J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-25 Romain Ceolato; Matthew J. Berg
Elastic backscatter lidar is an established method useful to characterize the particles forming an atmospheric aerosol. Fundamental to lidar measurements are the extinction and backscattering properties of the aerosol particles in the lidar beam. This review aims to give the reader an understanding for how lidar measurements are made, modeled, and applied. Specific emphasis is placed on extinction
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Measurement of polarization in Lyman-α line caused by anisotropic electron collisions in LHD plasma J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-12 Nilam Ramaiya; Motoshi Goto; Guillaume Seguineaud; Tetsutarou Oishi; Shigeru Morita
Polarization in the Lyman-α line caused by anisotropic electron collisions has been investigated in the Large Helical Device (LHD). High-sensitivity polarization-resolved measurements of the Lyman-α line from edge LHD plasma have been carried out. To obtain spectra of linearly polarized light at all angles a high-reflectivity mirror, a polarization analyzer, and a half-waveplate have been additionally
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Line parameters of the 4-0 band of carbon monoxide by high sensitivity cavity ring down spectroscopy near 1.2 µm J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-29 Baptiste Bordet; Samir Kassi; Alain Campargue
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Optical forces exerted by on-axis Bessel beams on Rayleigh particles in the framework of generalized Lorenz-Mie theory J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-10 Gérard Gouesbet
The study of optical forces exerted by off-axis Bessel beams on Rayleigh particles in the framework of generalized Lorenz-Mie theory demonstrated the existence of extra-forces named axicon forces, complementing the classical scattering and gradient forces already discussed extensively in the literature. The present paper revisits the same issue but in the more restricted case of on-axis beams. Results
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Temperature measurement of carbon dioxide using emission spectroscopy J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-05 Hanseul Shim; Sung Min Jo; Oh Joon Kwon; Gisu Park
This paper presents a relatively simple method for temperature measurement of hot carbon dioxide gas using an emission spectroscopy setup. The ν3 band emission at 4.3 µm is detected using an optical band-pass filter and a mercury cadmium telluride detector. A conversion methodology is introduced that calculates the detector voltage from the spectral radiance considering the spectral sensitivities of
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Line positions and intensities for the ν2/ν4 bands of 5 isotopologues of germane near 11.5 µm J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-15 C. Richard; V. Boudon; A. Rizopoulos; J. Vander Auwera; F. Kwabia Tchana
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Optimization and performance analysis of a multilayer structure for daytime radiative cooling J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-11 Mingeon Kim; Junyong Seo; Siwon Yoon; Heon Lee; Jungchul Lee; Bong Jae Lee
Daytime radiative cooling has drawn much attention recently because a target surface can be passively maintained at sub-ambient temperature. In order to implement a daytime radiative cooling device (simply ‘radiative cooler’), strong thermal emission should be focused in the mid-infrared regime (8–13 µm), called ‘atmospheric transparent window’. At the same time, absorption of the solar irradiation
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Scattering of evanescent wave generated by total reflection J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-15 Huayong Zhang; Zhenzhen Chen; Xianliang Wu
An exact semi-analytical solution to a scattering problem of evanescent wave incident on a particle is obtained. The evanescent wave is generated by total reflection as an electromagnetic plane wave propagates from an optically denser medium to an optically thinner one. The scattered fields by and internal fields within the particle are expanded in terms of spherical vector wave functions, and an integral
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The first comprehensive dataset of beyond-Voigt line-shape parameters from ab initio quantum scattering calculations for the HITRAN database: He-perturbed H2 case study J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-11 P. Wcisło; F. Thibault; N. Stolarczyk; H. Jóźwiak; M. Słowiński; M. Gancewski; K. Stankiewicz; M. Konefał; S. Kassi; A. Campargue; Y. Tan; J. Wang; K. Patkowski; R. Ciuryło; D. Lisak; R. Kochanov; L.S. Rothman; I.E. Gordon
We demonstrate a new method for populating line-by-line spectroscopic databases with beyond-Voigt line-shape parameters, which is based on ab initio quantum scattering calculations. We report a comprehensive dataset for the benchmark system of He-perturbed H2 (we cover all the rovibrational bands that are present in the HITRAN spectroscopic database). We generate the entire dataset of the line-shape
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Circularly-polarized Airy light-sheet spinner tweezers and particle transport J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-09 F.G. Mitri
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Backward fluorescence of optically thick Cs vapor: Experiment and Monte-Carlo simulations J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-09 João Carlos de Aquino Carvalho; Thierry Passerat de Silans
Backward fluorescence of thick atomic vapors exhibits a dip in the spectra at line center and sub-Doppler structures. We present backward fluorescence spectra of cesium vapor when excited around D2 line for densities for which atoms undergo a few collisions before emitting a photon. Changes on dip symmetry relative to line center and of sub-Doppler structures are observed. We perform Monte-Carlo simulations
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Photoionization cross section calculations of Ne-like Mo XXXIII J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-06 V Stancalie
Within the framework of Breit Pauli R-matrix approach, a close-coupling calculation has been carried out for the process of photoionization of ground and excited states of Ne-like Mo XXXIII ion. The calculation includes 60 fine-structure levels and 15 parities for the target states. Level specific photoionization cross sections are computed for all levels at a fine energy mesh of 10−5 scaled Ryd, with
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Application of the immersed boundary method in solution of radiative heat transfer problems J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-09 Malihe Mohammadi; Seyyed Abdolreza Gandjalikhan Nassab
The immersed boundary method (IBM) was developed for the first time in the present study to simulate the radiative heat transfer problems in complex geometries. The pseudo time stepping technique was applied to solve the radiative transfer equation (RTE) using the finite volume method (FVM). Also, the direct forcing-sharp interface was used in IBM. This method was validated with some benchmark problems
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Radiative lifetimes of A2Π, B2Σ+, 22Π, 12Σ–, C2Δ, and a4Σ+ states of carbon monosulfide cation J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-14 Shan Sun; Deheng Shi
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High-level relativistic MRCI+Q calculations on excited states of the SbI molecule J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-13 Xiaohui Zhou; Xiaomei Zhang; Yufang Liu
In this work, all-electron ab initio calculation on the SbI molecule has been carried out with the multi-reference configuration interaction plus the Davidson correction (MRCI+Q) method. In the calculation, total 34 Λ-S states have been obtained for the first time. From calculated PECs, the derived spectroscopic constants well agree with available experimental values. It should be mentioned that A3Π
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Vibrational levels of formaldehyde: calculations from new high precision potential energy surfaces and comparison with experimental band origins J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-13 Andrei V. Nikitin; Alexander E. Protasevich; Alena A. Rodina; Michael Rey; Attila Tajti; Vladimir G. Tyuterev
Vibrational energy levels of H2CO are reported using variational nuclear motion calculations from new ab initio and empirically optimized full 6-dimensional ab initio potential energy surfaces in the ground electronic state of the formaldehyde molecule. Ab initio calculations were carried out using extended electronic structure coupled-cluster calculations accounting for dynamic electron correlations
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Water vapor line profile at 183-GHz: temperature dependence of broadening, shifting, and speed-dependent shape parameters J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-12-11 M.A. Koshelev; I.N. Vilkov; D.S. Makarov; M.Yu. Tretyakov; B. Vispoel; R.R. Gamache; D. Cimini; F. Romano; P.W. Rosenkranz
The water vapor line at 183 GHz was studied over the temperature range of 219-358 K using a spectrometer with radioacoustic detection of absorption, providing a signal-to-noise ratio of up to 8000. The study includes the first measurement of speed-dependent collisional broadening and shifting of this line for both self- and air-broadening, and their temperature dependences. The sign of self-shifting
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New energy levels of La I found by laser spectroscopy J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-29 M. Faisal; I. Siddiqui; L. Windholz
Laser spectroscopy and optogalvanic detection was applied to investigate up to now unclassified or even unknown spectral lines of atomic lanthanum (La I). The exciting laser light had wavelengths between 4300 and 6800 Å. We report the discovery of seven new energy levels. One additional level turned out to be already known, but with wrong angular momentum. Altogether 53 spectral lines could be classified
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New infrared absorption cross sections for the infrared limb sounding of carbon tetrafluoride (CF4) J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-11 Jeremy J. Harrison
Carbon tetrafluoride (CF4), also known as tetrafluoromethane and sometimes CFC-14, has a natural lithospheric source, however the enhanced modern-day concentrations relative to this natural source have arisen from leaks into the atmosphere by industry, most significantly related to the production of aluminium and semiconductors. A potent greenhouse gas, with one of the longest atmospheric lifetimes
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The binary absorption coefficients for H2 + CO2 mixtures in the 2.12–2.35 µm spectral region determined by CRDS and by semi-empirical calculations J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-29 D. Mondelain; C. Boulet; J.-M. Hartmann
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A weighted-sum-of-gray soot-fractal-aggregates model for nongray heat radiation in the high temperature gas-soot mixture J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-28 Zhenzong He; Chuanhui Dong; Dong Liang; Junkui Mao
Soot, a product of insufficient combustion, is usually in the form of aggregate. The multi-scattering of soot fractal aggregates has been proved to play an important role in studying the soot radiative properties, which is rarely considered in predicting the radiative heat transfer in combustion flame. In the present study, based on the Rayleigh-Debey-Gans-Fractal-Aggregate (RDG-FA) theory, a model
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(UV, VIS) Laboratory evaluation of the lidar depolarization ratio of freshly emitted soot aggregates from pool fire in ambient air at exact backscattering angle J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-29 Lucas Paulien; Romain Ceolato; Frédéric Fossard; Patrick Rairoux; Alain Miffre
In this paper, a controlled-laboratory experiment is carried out to evaluate the lidar depolarization ratio of freshly emitted soot aggregates in the exact backward scattering direction at 180.0°. The experiment is performed at two wavelengths simultaneously, namely 355 and 532 nm, often used in polarimetric lidar remote sensing. The soot aggregates are generated from a kerosene JET A-1 pool fire in
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Active thermal radiation control with nanoslit graphene metasurface J. Quant. Spectrosc. Radiat. Transf. (IF 3.047) Pub Date : 2020-11-29 Kyohei Yada; Atsushi Sakurai
We propose a wavelength-selective emitter using nanoslit graphene metasurface. The nanoslit graphene metasurface consists of a graphene sheet, metallic slit, and dielectric layer for tailoring radiative properties. The utilization of rigorous electromagnetic simulation clarifies the mechanisms of thermal radiation. The proposed emitter shows high emissivity and a broad peak wavelength shift because