Journal of Quantitative Spectroscopy & Radiative Transfer最新文献

{"title":"Semiclassical dynamics of the lemniscate ordered emitters enhanced by plasmon-polaritons in nanorings","authors":"Gennadiy Burlak ,&nbsp;Gustavo Medina-Ángel","doi":"10.1016/j.jqsrt.2025.109740","DOIUrl":"10.1016/j.jqsrt.2025.109740","url":null,"abstract":"<div><div>The semiclassical dynamics of optical nanoemitters (NEs) arranged in the shape of a Bernoulli lemniscate (LB), enhanced by plasmon–polaritons (PPs) in a lattice of conducting nanorings (NRs), are investigated. The coupling of PP and NE is mediated by a common optical field and NE with a finite lifetime of pumping are considered. Using the FDTD approach, it is found that the field structure and the NE dynamics significantly depend on the plasma frequency of the NR. If the intersection point of the LB branches (the region of high NE density) is located inside the NR gaps, a significant increase in the laser field strength and quantum cross-correlations in the NE subsystem occurs. This effect may be exploited to create new types of emitting devices using dispersed nano-objects in modern nanoelectronics.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"350 ","pages":"Article 109740"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145498984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-channel modulation of vortex auto-focusing Airy beams and full-polarization states detection on a monolithic metasurface","authors":"Guoxia Han ,&nbsp;Kaiqi Liu ,&nbsp;Feiyang Zhang ,&nbsp;Yuhui Peng ,&nbsp;Yihan Tian ,&nbsp;Xiaolong Liu ,&nbsp;Xianghua Yu","doi":"10.1016/j.jqsrt.2026.109815","DOIUrl":"10.1016/j.jqsrt.2026.109815","url":null,"abstract":"<div><div>Combining the advantages of both auto-focusing Airy beams and vortex beams, the vortex auto-focusing Airy (VAFA) beam has received increasing attentions. However, conventional methods to generate VAFA beams usually require the utilization of bulky devices and complex optical systems, and the applications of VAFA beams are rarely reported. In this work, a novel method to generate and modulate multimode VAFA beams with a single monolayer metasurface is proposed based on the angularly spacing arrangement array and polarization multiplexing. Through spatial multiplexing and polarization multiplexing, we have significantly expanded the modulation capacity of a single-layer metasurface, enabling the synchronous and independent control of multiple optical channels. Based on this approach, we achieved complex manipulation of multimode VAFA beams and the generation of VAFA beams array. Additionally, leveraging the VAFA beam arrays, we designed a polarization-detection metasurface capable of full-polarization states detection. This work not only offers a fresh perspective on the flexible production of multiple beams with a single monolayer metasurface, but also presents the applications in the field of polarization detection of complex Airy beams, holding great potential for a wide range of applications in laser processing and optical communication.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"352 ","pages":"Article 109815"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trajectory-based far infrared collision-induced absorption spectra of CH4 CO2 in the temperature range from 70 K to 400 K","authors":"A.A. Finenko ,&nbsp;D.N. Chistikov ,&nbsp;A.O. Koroleva ,&nbsp;A.A. Vigasin","doi":"10.1016/j.jqsrt.2026.109810","DOIUrl":"10.1016/j.jqsrt.2026.109810","url":null,"abstract":"<div><div>This paper presents the far-infrared collision-induced absorption (CIA) spectra for CH<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> <img>CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> pairs obtained using trajectory-based simulations across a broad temperature range of 70–400 K. Our calculations rely on explicit quantum-chemical calculation of the potential energy and induced dipole surfaces, constructed under the rigid-monomer approximation. Our developed trajectory-based method enables modeling of the true dimer contribution to CIA profile, which is particularly important at low temperatures. Furthermore, we introduce a significant improvement to the Monte Carlo computational scheme, which substantially accelerates its convergence in the frame of our method. The spectra obtained in this work thus provide a reliable reference for evaluating the impact of CIA in radiative transfer models, with direct application for CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>–rich atmospheres such as Martian paleoatmosphere.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"352 ","pages":"Article 109810"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microwave-optical double-resonance spectroscopy of rubidium-87 atoms in a microcell","authors":"Alexandra A. Idrisova ,&nbsp;Armen D. Sargsyan ,&nbsp;David H. Sarkisyan ,&nbsp;Victor I. Balykin ,&nbsp;Anton E. Afanasiev","doi":"10.1016/j.jqsrt.2026.109829","DOIUrl":"10.1016/j.jqsrt.2026.109829","url":null,"abstract":"<div><div>We studied spectral properties of atoms in a microcell of 80 <span><math><mi>μ</mi></math></span>m length using the microwave-optical double-resonance (DR) spectroscopy in the presence of a magnetic field. The obtained spectra were compared with similar ones from atoms in a macroscopic vapor cell. The comparison demonstrates the potential of microcells for implementation of compact magnetometers. The effect of radiation trapping has been investigated as a limiting factor of the width of double-resonance spectral lines.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"352 ","pages":"Article 109829"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The predictive power of the calculated line lists of carbon monoxide","authors":"E.S. Medvedev,&nbsp;V.G. Ushakov","doi":"10.1016/j.jqsrt.2025.109759","DOIUrl":"10.1016/j.jqsrt.2025.109759","url":null,"abstract":"<div><div>The ability of our semi-empirical irregular dipole-moment functions (2022) and (2025) to predict the intensities of the yet unobserved lines, as well as to describe the observed ones not used in the fitting, is demonstrated by comparison with recent measurements in the 0-0, 1-0, 3-0, and 7-0 bands.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"350 ","pages":"Article 109759"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145553985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mid-infrared absorption cross sections for two unsaturated hydrocarbons: Allene and isoprene","authors":"K. Leroux,&nbsp;A. Rizopoulos,&nbsp;J. Vander Auwera","doi":"10.1016/j.jqsrt.2025.109737","DOIUrl":"10.1016/j.jqsrt.2025.109737","url":null,"abstract":"<div><div>Allene (propadiene) and isoprene (2-methyl-1,3-butadiene) are two volatile unsaturated hydrocarbons that play a key role in the chemistry of the Earth and planetary atmospheres. Optical remote sensing of these compounds in these environments require that appropriate quantitative spectroscopic information be available. This information is however limited for these species. In particular, wavenumber dependent absorption cross sections have only been reported once in the thermal infrared, relevant for current and future space missions. In the present work, Fourier transform spectra of allene and isoprene mixed with nitrogen at a total pressure of 1 atm have been recorded at 296 K and a resolution of 0.03 cm⁻¹ in the ranges <span><math><mrow><mn>600</mn><mo>−</mo><mn>2100</mn></mrow></math></span> cm⁻¹ (<span><math><mrow><mn>4</mn><mo>.</mo><mn>76</mn><mo>−</mo><mn>16</mn><mo>.</mo><mn>7</mn></mrow></math></span> <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span>) and <span><math><mrow><mn>600</mn><mo>−</mo><mn>2000</mn></mrow></math></span> cm⁻¹ (<span><math><mrow><mn>5</mn><mo>.</mo><mn>0</mn><mo>−</mo><mn>16</mn><mo>.</mo><mn>7</mn></mrow></math></span> <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span>), respectively. Absorption cross sections have been derived from 5 to 8 allene or isoprene sample pressures using a linear regression method and their overall uncertainties estimated. Obtained by direct summation over the whole ranges studied for each species, their integrated values were found to be <span><math><mrow><mn>2</mn><mo>.</mo><mn>88</mn><mspace></mspace><mrow><mo>(</mo><mn>7</mn><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mn>2</mn><mo>.</mo><mn>64</mn><mspace></mspace><mrow><mo>(</mo><mn>6</mn><mo>)</mo></mrow><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>17</mn></mrow></msup></mrow></math></span> cm/molecule for allene and isoprene, respectively. These absorption cross sections and integrated values were compared with previous measurements reported in the literature.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"350 ","pages":"Article 109737"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145531875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"van de Hulst essay: Geometric-phase portrayal of electromagnetic scattering by a three-dimensional object in free space","authors":"Akhlesh Lakhtakia","doi":"10.1016/j.jqsrt.2026.109809","DOIUrl":"10.1016/j.jqsrt.2026.109809","url":null,"abstract":"<div><div>Quantifying the dissimilarity in the locations of two plane waves on the Poincaré sphere by using spinor algebra, the concept of geometric phase was applied to initiate a novel portrayal of electromagnetic scattering by a three-dimensional object in free space. Whereas the incident electromagnetic field is that of an arbitrarily polarized plane wave, the direction-dependent far-zone scattering amplitude was used to define direction-dependent Stokes parameters for the scattered field. Both symmetric and asymmetric Poincaré spinors were formulated to characterize the polarization states of incident plane wave and the far-zone scattering amplitude, and two different geometric phases were defined therefrom. Density plots of both geometric phases were calculated for six different homogeneous isotropic spheres with different linear constitutive properties and boundary conditions: dielectric–magnetic spheres (non-dissipative and dissipative), impedance spheres, perfect electrically conducting spheres, charged dielectric–magnetic spheres, dielectric–magnetic spheres with topologically insulating surface states, isotropic chiral spheres, and isotropic chiral spheres with topologically insulating surface states. The incident plane waves were taken to be linearly and circularly polarized, for the sake of illustration. Numerical results revealed that geometric-phase density plots possess significantly richer features than their counterparts for the differential scattering efficiency. The geometric-phase portrayals exhibit enhanced sensitivity to changes in the size and composition of the scatterer, the boundary conditions, and the incident polarization state, suggesting promise for inverse-scattering problems.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"352 ","pages":"Article 109809"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Broadband spectrometry and thermal radiative properties of lunar dust simulants","authors":"Aravintha Raj Ravichandran,&nbsp;Vanessa Bristow,&nbsp;Joohyun Seo,&nbsp;Richard Z. Zhang","doi":"10.1016/j.jqsrt.2026.109821","DOIUrl":"10.1016/j.jqsrt.2026.109821","url":null,"abstract":"<div><div>Spectrometry of lunar dust simulants can provide better understanding of the Moon’s surface albedo, thermal radiation to its environment, detection of composition variations, and identifying presence of water. The Moon’s soil or regolith is composed of fine dust particles of mostly silica, alumina, and lime, with variations between lighter Highlands (Artemis) regions and darker Mares (Apollo) valleys. To better understand the variations on optical properties, we perform broadband diffuse and specular spectrometry from visible to far-infrared wavelengths of four Lunar regolith simulants. Dust simulants of coarse and fine blends were imaged in scanning electron microscope to validate the particle size distributions. In the visible to near-IR, fine-particle simulants show fewer differences in solar absorption and albedo, while FTIR measurements show compositional oxide differences. Surface absorptivity can vary between 0.63 at the Highlands and 0.79 in Mares, while Lunar albedo obtained from specular spectrometry relative to a Lambertian white reflecting standard can range between 0.79 and 0.64, respectively. Using diffuse FTIR spectrometry, thermal emissivity relative to room temperature blackbody across all Lunar simulants are around 0.78. Variations in spectral reflectance and emittance are dependent on sample humidity and heat treatments, aggregate packing, and scattering from large particles. This work can improve optical sensing methods, dust processing, and <em>in situ</em> resource manufacturing of Lunar regolith.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"352 ","pages":"Article 109821"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bidirectional reflectance of seawater","authors":"V.V. Marinyuk ,&nbsp;M.A. Pavlova ,&nbsp;D.B. Rogozkin ,&nbsp;S.V. Sheberstov","doi":"10.1016/j.jqsrt.2026.109818","DOIUrl":"10.1016/j.jqsrt.2026.109818","url":null,"abstract":"<div><div>A method is proposed for calculating the diffuse component of the bidirectional reflectance distribution function (BRDF) of a medium with relatively strong absorption, such as seawater. Our approach is based on the expansion of the reflectance in orders of scattering through large angles (compared to the characteristic single-scattering angle), which leads to the reflectance expansion in inverse powers of the absorption coefficient. Explicit expressions for the first two terms of the expansion are derived. The first term reproduces the well-known result of quasi-single-scattering approximation, and the second one corresponds to the contribution of quasi-double scattering (the small-angle multiple scattering before, between, and after two events of large-angle scattering). To validate our analytical results, we carry out numerical integration of the radiative transfer equation for the Henyey–Greenstein (HG) phase function, as well as for the two-term HG and Morel et al (for Case I water) ones. For optical parameters typical to seawater, our analytical formula is in excellent agreement with the results of numerical radiative transfer calculations over a wide range of illumination/viewing angles. Remarkably, the relative contribution of the quasi-double scattering proves to be rather sensitive to the shape of the phase function in the backward hemisphere.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"352 ","pages":"Article 109818"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A unified complex residual network for spectrum prediction of full-dielectric metasurfaces","authors":"Jiayi Zhang ,&nbsp;Tan Qu ,&nbsp;Yan Zhang ,&nbsp;Jiaji Wu ,&nbsp;Zhensen Wu","doi":"10.1016/j.jqsrt.2025.109786","DOIUrl":"10.1016/j.jqsrt.2025.109786","url":null,"abstract":"<div><div>Predicting the complex spectral responses of metasurfaces is critical for their design, whereas conventional simulations are computationally expensive, and existing neural models often lack generalization and fail to maintain phase–amplitude consistency. Thus, a unified complex residual neural network (Uni-CRN) for forward modeling of diverse all-dielectric metasurfaces, including cylindrical and H-shaped structures is proposed in this paper. Uni-CRN integrates complex-valued operators with residual modules in a three-stage architecture—comprising input projection, stacked complex residual blocks, and output prediction—enabling direct learning in the complex domain while preserving gradient stability in deep networks. This unified framework allows the same model to handle multiple metasurface types with minimal modification. Experiments demonstrate that Uni-CRN achieves a composite mean squared error of 3.2 × 10⁻⁴, with amplitude and phase prediction fidelities of 95.50 % and 99.37 % on the cylindrical dataset, outperforming previous methods. The results highlight Uni-CRN as an efficient and general approach for metasurface spectral modeling, providing a robust foundation for inverse design and cross-structure transfer learning.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"351 ","pages":"Article 109786"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145689298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}