Results 61 to 70 of about 9,803,992 (369)

Enhancing Diffraction Efficiency in Polarization Volume Gratings via Polymer‐Stabilized Cholesteric Liquid Crystal Bilayers

Advanced Materials Interfaces, EarlyView.
A tunable polarization volume grating (PVG) is demonstrated using a phase‐separated bilayer of polymer‐stabilized cholesteric liquid crystals (PSCLCs) with opposite handedness. The resulting dual‐band helical structure exhibits circular polarization selectivity, enhanced diffraction efficiency, and dynamic spectral control, offering new opportunities ...
Yu‐Chieh Chang, Ting‐Wei Gu, Yu‐Chieh Li, Ta‐Lung Chang, Chun‐Ta Wang   +4 more
wiley   +1 more source

All speed scheme for the low mach number limit of the Isentropic Euler equation [PDF]

, 2009
An all speed scheme for the Isentropic Euler equation is presented in this paper. When the Mach number tends to zero, the compressible Euler equation converges to its incompressible counterpart, in which the density becomes a constant.
Constantin, Degond, Degond, Harlow, Heul, Issa, Klein, Kurganov, Min Tang, Munz, Patankar, Pierre Degond, Rusanov   +12 more
core   +3 more sources

Construction of modified Godunov-type schemes accurate at any Mach number for the compressible Euler system

, 2016
This article is composed of three self-consistent chapters that can be read independently of each other. In Chapter 1, we define and we analyze the low Mach number problem through a linear analysis of a perturbed linear wave equation.
S. Dellacherie, Jonathan Jung, P. Omnes, P. Raviart   +3 more
semanticscholar   +1 more source

Silicon‐Integrated Next‐Generation Plasmonic Devices for Energy‐Efficient Semiconductor Applications

Advanced Materials Technologies, EarlyView.
Silicon (Si)‐integrated plasmonics offer a pathway to next‐generation, energy‐efficient semiconductor applications. This review highlights advances using complementary metal–oxide–semiconductor (CMOS)‐compatible materials like transparent conductive oxides and novel architectures, particularly coupled hybrid plasmonic waveguides (CHPWs).
Nasir Alfaraj, Amr S. Helmy
wiley   +1 more source

Effect of Mach number on the structure of turbulent spots [PDF]

, 2006
Direct numerical simulations have been performed to study the dynamics of isolated turbulent spots in compressible isothermal-wall boundary layers. Results of a bypass transition scenario at Mach 2, 4 and 6 are presented.
Krishnan, L., Sandham, N.D.
core   +1 more source

High Contrast and High Efficiency Optical Weighting for Integrated Photonic Computing

Advanced Optical Materials, EarlyView.
Herein, a combined pulse optical weighting scheme is proposed for photonic synapses. Employing a 4 μm$\umu{\rm m}$ long non‐volatile phase‐change material covered on a straight waveguide, a transmission contrast of 31.2 dB is achieved. By exploiting the non‐Arrhenius behavior of the material, the crystallization energy is reduced to 107 pJ, with ...
Hengyu Zhang, Hui Xu, Zhenyuan Sun, Bing Song, Qingjiang Li   +4 more
wiley   +1 more source

Computational Study of Shocked V-Shaped N₂/SF₆ Interface across Varying Mach Numbers

Axioms
The Mach number effect on the Richtmyer–Meshkov instability (RMI) evolution of the shocked V-shaped N2/SF6 interface is numerically studied in this research. Four distinct Mach numbers are taken into consideration for this purpose: Ms=1.12,1.22,1.42, and
Salman Saud Alsaeed, Satyvir Singh
doaj   +1 more source

Electron Pre-acceleration at Nonrelativistic High-Mach-number Perpendicular Shocks [PDF]

, 2017
We perform particle-in-cell simulations of perpendicular nonrelativistic collisionless shocks to study electron heating and pre-acceleration for parameters that permit the extrapolation to the conditions at young supernova remnants.
A. Bohdan, J. Niemiec, O. Kobzar, M. Pohl   +3 more
semanticscholar   +1 more source

High‐Endurance and Energy‐Efficient All‐Optical Programming of Scalable Silicon Waveguides with Integrated Phase‐Change Material Patches

Advanced Optical Materials, EarlyView.
Phase change materials are integrated into silicon photonic circuits via 200 mm industrial wafer processes. Interferometric optical characterization reveals switching thresholds, transmission modulation, phase shifts, and record endurance (>108 cycles).
Rajath Sawant, Anthony Albanese, Arnaud Rogemont, Gregorio Gonzalez‐Cortes, Yoann Brûlé, Lara Karam, Jean‐Baptiste Jager, Stephane Malhouitre, Benoit Charbonnier, Aurélien Coillet, Pierre Noé, Benoit Cluzel   +11 more
wiley   +1 more source

Ultrabright Fiber‐Coupled Polarization‐Entangled Photon Source with Spectral Brightness Surpassing 2.0 MHz mW−1 nm−1

Advanced Photonics Research, EarlyView.
In this study, it implements a high‐efficiency polarization‐entangled photon source based on single‐mode fiber coupling with a spectral brightness exceeding 2.0 MHz mW−1 nm−1, utilizing a spatial mode‐matching technique. The results of this study provide a more intuitive and practical guide for implementing high‐efficiency quantum light sources ...
Kyungdeuk Park, Jungmo Lee, Dong‐Gil Im, Dongkyu Kim, Yong Sup Ihn   +4 more
wiley   +1 more source