Article
Physics, Applied
P. D. Pupyrev, A. M. Lomonosov, I. A. Nedospasov, A. P. Mayer
Summary: The study revealed the presence of highly localized leaky waves at the edge of a silicon crystal, with efficient excitation achieved at specific angles. The reflection of surface acoustic wave pulses from the sample edge and their partial conversion into leaky waves were observed using optical probe-beam deflection in laser ultrasound experiments.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Giovanni Riccio, Gianluca Gennarelli, Flaminio Ferrara, Claudio Gennarelli, Rocco Guerriero
Summary: This research paper proposes an analytical approach for evaluating electromagnetic scattering from a planar complex object made of a perfect electric conductor. The method is based on the physical optics approximation of equivalent sources and works in the framework of the uniform geometrical theory of diffraction. The effectiveness of the proposed approach is tested and proved using a full-wave numerical tool to generate reference values.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Cuncheng Weng
Summary: This paper investigates the correlation between grating diffraction and photon-phonon scattering in Raman-Nath diffraction, proposing a model where they occur simultaneously and independently. The study confirms the model by analyzing zeroth-order diffracted light through theoretical and experimental methods, showing that the intensity signal consists of cosine signals with frequencies shifted by different integer multiples of the ultrasonic frequency, in good agreement with the Raman-Nath diffraction model.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Optics
Jiang Zhu, Chengling Bian, Zhibin Zhao, Xing-Dong Zhao, Lu Qin, Ying-Ying Zhang, Lu Zhou, Guangjiong Dong
Summary: This paper analyzes and numerically calculates the light scattering phenomenon of superradiance, finding that superradiant light scattering (SLS) is induced when the number of atoms is small, and the light scattering saturates with increasing atom number. By treating the atomic grating as a dynamic photonic crystal, the study discovers rich time-dependent optical properties, which is significant for investigating tunable photonic crystals in the time domain.
Article
Optics
Pavel Honzatko, Jiri Ctyroky
Summary: A new type of flat metal-dielectric grating has been designed to replace blazed diffraction gratings, offering high efficiency, durability, and ease of fabrication. Through rigorous electromagnetic theory, it has been shown that the properly designed grating can achieve 100% diffraction efficiency in the Littrow configuration for both TE and TM polarizations. The properties of the grating have been thoroughly analyzed and discussed in detail.
Article
Materials Science, Multidisciplinary
Hui Chen, Celine Montanari, Ravi Shanker, Saulius Marcinkevicius, Lars A. Berglund, Ilya Sychugov
Summary: Transparent wood (TW), as an emerging biocomposite, combines optical functionality with structural properties of wood. However, the complex optical response of hierarchical materials hinders their direct study and control, making a detailed understanding of light-material interaction mechanisms necessary for achieving optically clear wood.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Optics
Chenxu Gao, Bingqiang Sun, Yijun Zhang
Summary: The scattering characteristics of electromagnetic waves in a uniformly charged coated sphere are analyzed using the Lorenz-Mie theory, with numerical calculations for charges on the interior core and exterior shell surfaces. The results show that the scattering characteristics are affected by the radius ratio of the two layers and surface potential, with Rayleigh scattering replacing the analytical solution derived from the Lorenz-Mie theory in a regime where scattering is significantly influenced by charges.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Optics
Simon A. Dengler, Rainer Engelbrecht, Bernhard Schmauss
Summary: This study measured the absolute value of the backscattering coefficient of a standard 1 mm core-diameter, multimode step-index polymethylmethacrylate polymer optical fiber for the spectral range of 450 nm to 700 nm. The backscattering coefficient was calculated and compared with the spectral attenuation, with results indicating that Rayleigh scattering is the main cause of scattering.
Article
Optics
Chenyuan Xu, Yilun Wang, Cheng Zhang, Beatrice Dagens, Xinliang Zhang
Summary: Optical differentiators break mirror symmetry to achieve spatial and temporal differentiation with high resolutions, showing potential multifunctionality in various applications.
Article
Nanoscience & Nanotechnology
Robert Collison, Juan B. Perez-Sanchez, Matthew Du, Jacob Trevino, Joel Yuen-Zhou, Stephen O'Brien, Vinod M. Menon
Summary: This study demonstrates the control of energy transfer between molecular dyes using surface lattice resonances in arrays of metal-insulator-metal nanocylinders. The results indicate that by tuning the resonance frequency and lattice dimensions, the mechanism of energy transfer can be manipulated, affecting the fluorescence behavior of the molecules.
Article
Optics
Moritsugu Sakamoto, Yusuke Kaneko, Yushi Kakedo, Kohei Noda, Tomoyuki Sasaki, Masayuki Tanaka, Takeya Sakai, Yukitoshi Hattori, Nobuhiro Kawatsuki, Hiroshi Ono
Summary: A hybrid polarization grating capable of spatially separating vector beams with the same polarization topological charge is presented, which can increase the number of detectable vector beams. This device shows promise for stable demultiplexing of multiple vector beams using a compact optical system.
Article
Materials Science, Multidisciplinary
Jiaqi Quan, Qingjia Zhou, Yanyan Cao, Yadong Xu
Summary: In this study, the diffraction properties of subwavelength metallic gratings (OMGs) are reexamined from the concept of phase-gradient metasurfaces (PGMs). It is found that OMGs can be regarded as a PGM, and their diffraction properties can be fully predicted by a generalized diffraction law with phase gradient. The study reveals the significant role of phase gradient in well-known effects such as Wood's anomalies and Rayleigh's conjecture.
FRONTIERS IN MATERIALS
(2022)
Article
Chemistry, Analytical
Ye Wang, Xiuhua Fu, Yongyi Chen, Hangyu Peng, Li Qin, Yongqiang Ning, Lijun Wang
Summary: This paper introduces a design for a high-efficiency transmission grating in the 4.7 μm band, made of composite materials with diffraction efficiency exceeding 96%. The grating has a first-order diffraction efficiency of over 99.77% at 4746 nm. This optimized design may boost spectral beam combining power and brightness effectively.
Article
Optics
Yansheng Liang, Shaohui Yan, Zhaojun Wang, Baoli Yao, Ming Lei
Summary: This paper introduces a new mechanism for stable confinement of metallic microparticles using a tightly focused linearly polarized Gaussian beam, allowing the particles to be captured off the optical axis and observed spinning transversely in response to asymmetric force fields. This method may offer a new way for effective manipulation of metallic microparticles.
PHOTONICS RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Haiwang Yong, Daniel Keefer, Shaul Mukamel
Summary: In this theoretical study, a novel measurement is proposed to directly monitor the evolving nuclear wave packet and unambiguously image photochemical events in real time. By subtracting ultrafast gas-phase X-ray and electron diffraction signals, the nuclear charge densities can be singled out, revealing the shape and trajectory of the nuclear wave packets as well as the electronic coherences near conical intersections.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)