Article
Materials Science, Multidisciplinary
Demeng Feng, Raymond A. Wambold, Yuzhe Xiao, Chenghao Wan, Zhaoning Yu, Victor W. Brar, Mikhail A. Kats
Summary: The researchers proposed a method to enhance the optical pressure on a metal film suspended in free space by structuring it with a periodic array of nanoscale slots. However, their result contradicts the law of momentum conservation. Recalculations of the optical forces show that there was no enhancement, but instead matched the standard radiation-pressure relation.
Article
Materials Science, Ceramics
Hongtian He, Gang Shao, Rui Zhao, Yi Liang, Hailong Wang, Bingbing Fan, Hongxia Lu, Hongliang Xu, Rui Zhang, Linan An
Summary: This paper investigated the effect of hot oscillatory pressing (HOP) on the sintering behavior, using sapphire whisker reinforced zirconia ceramic composite as a model material. The results were discussed by considering grain boundary sliding as a viscoelastic process, and provided scientific guidance for determining optimized HOP parameters.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Optics
Evgeny Bulgakov, Konstantin Pichugin, Almas Sadreev
Summary: The high-Q resonant Mie modes supported by a high index dielectric spherical particle lead to sharp resonances in the radiation pressure. In the presence of a perfectly conducting metal surface, these Mie modes transform into high-Q magnetic bonding or electric antibonding modes, resulting in repulsive or attractive resonant optical forces when close to the surface. By exciting electric bonding or magnetic antibonding resonant modes, resonant optical forces of about 1 nN for micron-sized silicon particles can exceed gravitational forces by four orders of magnitude, with stable positions between pulling and pushing forces allowing for resonant binding to a metal surface.
Article
Acoustics
Xudong Fan, Likun Zhang
Summary: This study extends the Born approximation method to analyze trapping forces exerted by acoustic fields on objects of arbitrary size and shape, showing that it can accurately predict trapping forces on weakly scattering objects. The effects of beam parameters, object shape, and orientation on trapping behaviors are revealed, providing insights for further study and experimentation with acoustic tweezers.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Editorial Material
Environmental Sciences
Zhuoyi Tu, Yuting Yang, Michael L. L. Roderick, Tim R. R. McVicar
Summary: We appreciate Dr Szilagyi's interest and concerns. We argue that the assumption of constant net solar radiation is more universally applicable for estimating potential evaporation. Furthermore, we clarify that no calibrations were used in our applications of the various CR models, ensuring a fair and meaningful inter-model comparison.
WATER RESOURCES RESEARCH
(2023)
Editorial Material
Multidisciplinary Sciences
Oliver Tschauner, Shichun Huang, Munir Humayun, Wenjun Liu, George R. Rossman
Summary: Walter et al. criticize our study based on misinterpretation of diffraction data, insufficient analysis of compositional data, and arbitrary assumption about mantle temperature variations.
Article
Materials Science, Multidisciplinary
R. Ali, R. S. Dutra, S. Iqbal
Summary: Using two linearly (circularly) polarized plane waves, an intriguing phenomenon of local positive and negative radiation pressure on dielectric (chiral) slabs is revealed. A theory is developed for the first time to describe the local radiation pressure caused by the interference between the two obliquely impinging (non-collinear) light sources. Numerical analysis shows that the radiation pressure on the slabs strongly depends on the angle of incidence, polarization, and chirality parameters.
Article
Materials Science, Multidisciplinary
A. Leal Jr, A. Theodosiou, A. Frizera, A. J. Fernandes, A. Stancalie, A. Ioannou, R. Mihalcea, D. Negut, D. Ighigeanu, K. Kalli, C. Marques
Summary: This letter presents a material analysis of the CYTOP fiber under gamma and electron radiation. The influence of radiation on the CYTOP material composition is studied using FTIR and Raman spectroscopy, with Raman spectroscopy applied to two regions of the fiber. The results show that electron radiation causes a 60% higher variation in material composition compared to gamma radiation in FTIR tests, indicating both radiation conditions induce compositional changes in the CYTOP fiber core.
Article
Optics
Christopher Jones, Brandon A. Kemp, Cheyenne J. Sheppard
Summary: The article discusses the phenomenon of reversed radiation pressure on free electrons in nanoparticles, which requires the real part of the particle's permittivity to be negative. It is found that Rayleigh scattering theory is more suitable for modeling single particles compared to Mie theory, and a multiparticle Rayleigh scattering approach demonstrates the interaction enhancing the radiation attraction of free electrons between closely spaced particles.
OPTICAL ENGINEERING
(2021)
Article
Thermodynamics
Qi Jin, John T. Wen, Shankar Narayan
Summary: This study analyzes the effect of using an oscillatory valve opening on the flow distribution and channel temperatures across a two-channel evaporator. Experiments and prediction models indicate that a specific range of valve oscillation amplitude and frequency may cause synchronization resulting in balancing the flow distribution and temperature.
APPLIED THERMAL ENGINEERING
(2022)
Article
Optics
Le Tri Dat, Sang H. Luong, Vinh N. T. Pham, Nguyen Duy Vy, Takuya Iida
Summary: In this work, the authors theoretically investigate the effect of radiation pressure on a graphene layer inserted inside an optical microcavity. The results show that the radiation pressure force can be effectively tuned by changing the optical parameters and the position of the graphene. The graphene also alters the distribution of the optical field and the radiation pressure on the cavity mirrors. The optical rigidity strongly depends on the system parameters and reaches a value of ~30 pN/lambda.
OPTICS COMMUNICATIONS
(2022)
Article
Thermodynamics
Qi Jin, Yanshun Yu, Yaobiao Xia
Summary: This study investigates the effects of three oscillatory electronic valve settings on mass flow rate and pressure drop oscillation (PDO) characteristics in microchannel cooling systems. It is found that a specific range of valve oscillation amplitude and frequency can significantly reduce PDO amplitude. The square function has a better PDO suppression compared to the sinusoidal and sawtooth functions. Experimental results confirm the impact of valve settings on PDO.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Optics
Haitang Yang, Yitian Liu, George V. Eleftheriades
Summary: We propose a generalized periodic super-oscillatory (SO) mask that can push the borders of the region of interest (ROI) away for imaging extended objects. Our experimental results demonstrate single-shot extended-object SO imaging with ROIs more than ten times the size of typical ROIs and a sub-wavelength resolution.
Article
Optics
Amin Mousavi, Fahimeh Hosseinibalam, Smaeyl Hassanzadeh
Summary: This study simulated the motion of particles with low thermal conductivity, such as carbon nanoclasts aerosols, when irradiated by optical tubes like Laguerre-Gaussian and Bessel-Gaussian beams. The analysis showed that optical forces, including radiation and photophoretic forces, can guide particles into specific beam areas based on their size and beam properties, with some particles potentially being completely trapped.
Article
Engineering, Aerospace
Pavel Bulat, Katerina Komar, Nickolay Prodan, Konstantin Volkov
Summary: This article discusses the unsteady, transient, and oscillatory processes that occur in the nozzle devices of rocket engines. It examines the causes and mechanisms of low-frequency oscillations and identifies the design parameter ranges that ensure non-oscillating gas-dynamic flow processes.
Article
Optics
Jianbao Zhao, Brant E. Billinghurst, Paul L. Raston
Summary: The far-infrared spectrum of room temperature formic acid labeled with 13C has been recorded and analyzed, leading to the determination of accurate line positions and predictions relevant to Earth's atmosphere and interstellar sources.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Semen Vasilchenko, Alexander Solodov, Oleg Egorov, Vladimir Tyuterev
Summary: Ozone plays a crucial role in atmospheric chemistry and radiative processes, and it may serve as a potential biosignature species in exoplanetary observations. This study utilized a continuous-wave cavity-ring-down spectrometer to accurately measure the absorption cross-sections of ozone in the near-infrared range. The results provide more precise data and have potential applications in atmospheric research.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Baorui Huang, Bo Peng, Qifeng Ren, Sheng Liao
Summary: This study utilizes the polarization bidirectional reflectance distribution function (p-BRDF) model derived from the microfacet theory to analyze the spectral p-BRDF of a brass surface. The results show that factors such as polarization state, wavelength, surface roughness, and permittivity have a significant impact on the distribution of BRDF on the object surface.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Qingwei Duan, Jiajie Wang, Qiwei Li, Xiang'e Han, Kuan Fang Ren
Summary: This paper introduces the applications of the generalized Lorenz-Mie theory (GLMT) and the vectorial complex ray model (VCRM) in the interaction between beams and particles. By comparing the experimental results, it is found that VCRM performs well in Gaussian beam scattering problems, providing a new method for studying the scattering of shaped beams by large particles/objects of any shape.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Yuefan Du, Xiaoping Li, Lei Shi, Fangyan Li, Shurong Yuan
Summary: This study proposes a physics-constrained model that utilizes the distribution characteristics of gas spectral parameters to predict spectral parameters for unknown wavelengths. Experimental results show that the model improves prediction accuracy and increases the data volume of gas spectral parameters by 4-5 times.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Laurentius Windholz, Imran Siddiqui, Shamim Khan, Syed Tanweer Iqbal
Summary: In this study, we report the discovery of two energy levels of the Pr atom that exhibit strong J-mixing, as well as the observed hyperfine structure patterns. The composition of wave functions, in addition to J-values, plays a crucial role in determining the appearance of these patterns.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Matthias Germann, Adrian Hjalten, Jonathan Tennyson, Sergei N. Yurchenko, Iouli E. Gordon, Christian Pett, Isak Silander, Karol Krzempek, Arkadiusz Hudzikowski, Aleksander Gluszek, Grzegorz Sobon, Aleksandra Foltynowicz
Summary: In this study, optical frequency comb Fourier transform spectroscopy was used to record the spectroscopic data of formaldehyde in a specific frequency range. The line positions and intensities of rovibrational transitions were obtained through line-by-line fitting. By incorporating these accurate line positions into the analysis, more energy levels and rovibrational transitions were predicted with reduced uncertainties in the H2CO spectrum.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Leonardo A. Ambrosio, Jhonas O. de Sarro, Gerard Gouesbet
Summary: This study derives a polychromatic version of the generalized Lorenz-Mie theory stricto sensu (GLMT) by expanding arbitrary time-dependent fields into partial waves using Bromwich scalar potentials. The new formalism introduces field shape spectra (FSSs) which are intrinsically frequency-dependent, modifying and redefining the physical quantities expressed in the monochromatic GLMT.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Patrick C. Chaumet
Summary: The paper proposes two new methods (IDR(s) and GPBiCGstab(L)) for computing the electromagnetic diffraction of objects larger than the wavelength. It is found that IDR(s) can reduce computation time but may not converge in some cases, while GPBiCGstab(L) always converges and also reduces computation time compared to QMR, GPBiCG, and BiCGstab.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Antigoni Kleanthous, Anthony J. Baran, Timo Betcke, David P. Hewett, Christopher D. Westbrook
Summary: To improve weather and climate models, it is important to accurately calculate the single-scattering properties of randomly oriented complex atmospheric ice crystals. This study applies Boundary Element Method (BEM) to calculate these properties in the microwave and sub-millimeter region of the electromagnetic spectrum for all-sky data assimilation. The results show that BEM can accurately compute the scattering properties of complex ice aggregates, which is crucial for weather and climate models.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Ben Niu, Yanting Li, Gang Xiong, Jihui Chen, Zhimin Hu, Yunqing Fu, Yaming Zou, Chongyang Chen, Ke Yao
Summary: This study presents both experimental and theoretical analysis of the 4d 2D5/2 -> 2D3/2 magnetic dipole transition in Rb-like ions. The correlation between the theoretical and experimental findings is observed, and it is illustrated that the contribution of the core-valence correlation is pivotal for the fine structure splittings.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
James A. Lock, Gunther P. Konnen, Philip Laven
Summary: Researchers have derived an analytical generalization of Airy theory that provides a more accurate approximation for the primary rainbow, but still has limitations for the second-order rainbow and beyond.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Shixiong Wu, Xuebang Gao, Xuqiang Dou, Li Xie
Summary: In this paper, an indoor experimental study was conducted to investigate the optical attenuation caused by sand/dust storms at different relative humidity levels. It was found that the hygroscopic growth of sand/dust particles has a significant effect on optical attenuation when the relative humidity is above 60%. Based on the double-parameter Kasten model, a proposed optical attenuation model takes into account visibility, particle size, relative humidity, and optical wavelength. Numerical calculations considering the hygroscopicity effect were also performed, and the results were in agreement with the experimental data.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Zhimin Yang, Jaeman Song, Bong Jae Lee
Summary: In this study, we analyze TPX cells operating in the self-sustaining circuit and examine the effects of different bandgaps on their performance. The results show that the bandgap energy of the LED must exceed that of the PV cell for the TPX cell to function in a self-sustaining parallel circuit. Additionally, a narrower bandgap energy for the PV cell and a wider bandgap energy for the LED can improve the performance of the TPX cell in the self-sustaining circuit.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)