Results 61 to 70 of about 20,560 (308)

Modal Theory of Phase‐Modulated and Frequency‐Shifting Ring Cavities

Advanced Photonics Research, EarlyView.
We present a theoretical and experimental characterization of the optical modes of dispersionless ring cavities with phase modulators or frequency shifters. Their response to arbitrary modulation acts as a filter for phase‐modulated modes that determine the optical output of passive resonators and lasers. This provides a general framework for analyzing
Miguel Cuenca, Haroldo Maestre, Carlos R. Fernández‐Pousa   +2 more
wiley   +1 more source

Strong Resonant Enhancement in Polarization Anisotropy in Third Harmonic Generation from MoS2 Disks with Subtle Structural Ellipticity

Advanced Photonics Research, EarlyView.
Strong resonant amplification in polarization anisotropy in third harmonic generation (THG) response from isolated MoS2 disks with small structural ellipticity introduced during fabrication is reported. This is attributed to the high refractive index of the MoS2 disk that supports characteristic anapole resonances combined with the cubic dependence of ...
Asish Prosad, Rabindra Biswas, Urmila Bag, Varun Raghunathan   +3 more
wiley   +1 more source

Displacement and Vibration Measurements with Interferometers: Benchmark Configurations, Performance, and R&D Opportunities

Advanced Photonics Research, EarlyView.
Self‐mixing interferometry is a powerful technique that brings together the exceptional sensitivity of phase measurements with the unequalled simplicity of the self‐mix configuration based on modulation of the cavity field induced by the return from the target. According to the selected measurand, displacement or vibration, and to the analog of digital
Silvano Donati
wiley   +1 more source

Phase‐Change Materials for Volatile Threshold Resistive Switching and Neuronal Device Applications

Advanced Science, EarlyView.
Volatile threshold switching materials are an important pathway to simulate neuronal behavior. This review summarizes recent advances in the development of volatile resistive switching devices and neuronal oscillators based on three representative phase change materials, emphasizes the major challenges in this rapidly evolving field, and provides an ...
Huandong Chen, Jayakanth Ravichandran
wiley   +1 more source

Water, Collagen, and Lipid Content in the Human Skin and Muscles Assessed with Near‐Infrared Diffuse Reflectance Spectroscopy and Multi‐Spectral Optoacoustic Tomography

Advanced Science, EarlyView.
Authors present a novel approach combining multispectral optoacoustic tomography and diffuse reflectance spectroscopy for noninvasive assessment of body composition, including water, lipid, and collagen in skin and muscles. Its high molecular and spatial specificity offers improved diagnostic potential for conditions like obesity and sarcopenia ...
Denis Davydov, Alexey Kurnikov, Pavel Subochev, Gleb Budylin, Nikolay Fadeev, Ivan Filippov, Natalia Mokrysheva, Liliya Urusova, Daniel Razansky, Evgeny Shirshin   +9 more
wiley   +1 more source

Identifying Beneficial and Adverse Co4+ Species in Cobalt‐Based Oxygen Evolution Catalysts via Precursor Polymorphism Engineering

Advanced Science, EarlyView.
This study resolves conflicting roles of Co⁴⁺ species in cobalt‐based oxygen evolution reaction (OER) catalysts by engineering precursor polymorphism. Through controlled annealing of cobalt oxysulfide, researchers selectively stabilize γ‐CoO2 (enabling oxygen pathway mechanism) and β‐CoO2 (following conventional mechanism). γ‐CoO2 demonstrates superior
Zhongheng Li, Zheng Shu, Lun Li, Wendi Zhang, Jiaqian Kang, Chengcheng Zhong, Ziwen Feng, Jinxian Feng, Hou Ian, Hui Pan   +9 more
wiley   +1 more source

Superintegrable Oscillator and Kepler Systems on Spaces of Nonconstant Curvature via the Stäckel Transform

Symmetry, Integrability and Geometry: Methods and Applications, 2011
The Stäckel transform is applied to the geodesic motion on Euclidean space, through the harmonic oscillator and Kepler-Coloumb potentials, in order to obtain maximally superintegrable classical systems on N-dimensional Riemannian spaces of nonconstant ...
Ángel Ballesteros, Alberto Enciso, Francisco J. Herranz, Orlando Ragnisco, Danilo Riglioni   +4 more
doaj   +1 more source

Stochastic Electrodynamics: Lessons from Regularizing the Harmonic Oscillator

Atoms, 2019
In this paper, the harmonic oscillator problem in Stochastic Electrodynamics is revisited. Using the exact shape of the Lorentz damping term prevents run-away effects.
Theodorus Maria Nieuwenhuizen
doaj   +1 more source

Efficient Noncollinear Second‐Harmonic Generation in Pb(In1/2Nb1/2)O3‐Pb(Mg1/3Nb2/3)O3‐PbTiO3 Crystals Through Domain‐Engineering

Advanced Science, EarlyView.
This study introduces a domain‐engineered PIN‐PMN‐PT ferroelectric crystal that enables efficient broadband second harmonic generation (SHG) without angle or temperature tuning. By engineering a “2T” domain structure, high SHG efficiency is achieved by noncollinear phase matching.
Xin Liu, Wenxu Huang, Kexin Song, Haisheng Guo, Weigang Zhao, Fusheng Qiu, Zhuo Xu, Fei Li, Xiaoyong Wei   +8 more
wiley   +1 more source

Ferroelectric Properties of Bilayer MoS2/WS2 Heterostructure Modulated by Twist Angle

Advanced Science, EarlyView.
The study reports the precise control of interlayer twist angles in the bilayer MoS2/WS2 heterostructure. The ferroelectric properties of MoS2/WS2 heterostructure can be significantly modulated by designing twist angles, resulting from the distortion of polar symmetric regions induced by Moiré patterns.
Liyao Wang, Zhuopeng Xia, Xiaoyao Sun, Shiyao Xu, Guodong Sun, Yingying Zheng, Zhen Zhan, Enlong Li, Songhua Cai, Yuan Zhang, Jinzhu Zhao, Wenwu Li, Shuoguo Yuan   +12 more
wiley   +1 more source