Results 31 to 40 of about 2,688 (224)

Auxiliary differential equation (ADE) implementation of complex-frequency shifted perfectly matched layer (CFS-PML) [PDF]

Advances in Intelligent Systems Research, 2015
In this paper, an efficient auxiliary differential equation (ADE) method is proposed to implement stretched-coordinate perfectly matched layer (SC-PML) in finite-difference time-domain (FDTD). The derivation of discrete difference operators for the ADE-PML equation for FDTD is also presented.
Yunpeng Ma, Peilin Huang, Jinzu Ji
openaire   +1 more source

Vibrations Induced by a Low Dynamic Loading on a Driven Pile: Numerical Prediction and Experimental Validation

Vibration, 2022
The present paper addresses the problem of generating and propagating vibrations induced by low-impact loading on a driven pile. In this context, an experimental test site was selected and characterized, where ground-borne vibrations induced by the ...
Aires Colaço, Pedro Alves Costa, Cecília Parente, Ahmed M. Abouelmaty   +3 more
doaj   +1 more source

Direct-Splitting-Based CN-FDTD for Modeling 2D Material Nanostructure Problems

IEEE Open Journal of Antennas and Propagation, 2020
Incorporating a truncation of the complex-frequency-shifted perfectly matched layer (CFS-PML), the direct-splitting- based Crank-Nicolson finite-difference time-domain (CNDS-FDTD) is developed and applied to the infrared two-dimensional layered material (
Naixing Feng, Yuxian Zhang, Qingsheng Zeng, Meisong Tong, William T. Joines, Guo Ping Wang   +5 more
doaj   +1 more source

FEA_LiNbO3: Finite element analysis of novel LiNbO3 material based fiber for optical communication properties of nonlinear applications

Alexandria Engineering Journal, 2022
This study introduces a distinctive LiNbO3-based five-ring heptagonal-shaped photonic crystal fiber (PCF) geometry that demonstrates exceptionally high birefringence (Br) and nonlinear coefficient (NLC).
Ruhul Amin, Rana M. Taha, Baraa Riyadh Altahan, Noor Mohammadd, Kawsar Ahmed, Francis M. Bui, Fahad Ahmed Al-Zahrani, Shobhit K. Patel   +7 more
doaj   +1 more source

Submicron Metasurface Reconfigured Multiband Smart Windows

Advanced Functional Materials, EarlyView.
This work presents a submicron metasurface reconfigured multiband thermochromic smart window. By integrating subwavelength nanostructures into a Fabry−Perot resonator configuration, it mitigates conventional trade‐offs to simultaneously deliver high luminous transmittance and robust solar heating and radiative cooling modulation capabilities ...
Guanya Wang, Shancheng Wang, Bin Li, Xinyi Tian, Rong Liu, Jian Chen, Zhendong Dai, Shouqin Tian, Yi Long   +8 more
wiley   +1 more source

An Optimized Perfectly Matched Layer for the Schrödinger Equation

, 2011
We derive a perfectly matched layer (PML) for the Schrödinger equation using a modal ansatz. We derive approximate error formulas for the modeling error from the outer boundary of the PML and the error from the discretization in the layer and show how to
Kreiss, Gunilla,, Anna Nissen, Nissen, Anna,, Gunilla Kreiss   +3 more
core   +1 more source

Tunable Extraordinary Optical Transmission in the Long‐Wavelength Infrared Range Using Electrostatic MEMS Actuation

Advanced Materials Technologies, EarlyView.
A MEMS‐integrated metamaterial filter enables continuous, low‐voltage spectral tuning in the long‐wavelength infrared (LWIR). The device employs extraordinary optical transmission in a dual suspended metasurface stack, where electrostatic actuation precisely controls the intermembrane air gap.
Oleg Bannik, Fedor Kovalev, Michal Zawierta, Dilusha Silva, Lorenzo Faraone, Ilya Shadrivov, Mariusz Martyniuk   +6 more
wiley   +1 more source

Investigation of gas sensor based on differential optical absorption spectroscopy using photonic crystal fiber

Alexandria Engineering Journal, 2020
This study presented a novel shape photonic crystal fiber based gas sensor for the first time. Perfectly circular shape air hole are arranged to form core and cladding region.
Bikash Kumar Paul, Kawsar Ahmed, Vigneswaran Dhasarathan, Fahad Ahmad Al-Zahrani, Mst. Nargis Aktar, Muhammad Shahin Uddin, Arafa H. Aly   +6 more
doaj   +1 more source

Spacer‐Less Substrate‐Integrated Metasurface for Near‐Unity Terahertz Absorption

Advanced Optical Materials, EarlyView.
ABSTRACT Although conventional metal‐insulator‐metal (MIM) terahertz (THz) absorbers can provide near‐unity absorption, their multilayer stacks inevitably introduce additional thickness, mass, and residual stress, which limit their compatibility with THz thermal sensing platforms.
Zihao Zhao, Kazuho Harada, Qian Liu, Isao Morohashi, Xu Fang, Kazuhiko Hirakawa, Ya Zhang   +6 more
wiley   +1 more source

Ultrabroadband and Highly Sensitive Short‐Wave Infrared Molecular Fingerprinting via Acoustic MXene Plasmons

Advanced Science, EarlyView.
Acoustic plasmons in Ti3C2Tx MXene strongly compress infrared electromagnetic fields and enhance light–matter interactions at the nanoscale. This platform couples broadband plasmon excitations with molecular vibrations, enabling simultaneous sensing of high‐ and low‐frequency vibrational modes in ultrathin PMMA and graphene oxide films, and extending ...
Changhoon Park, Jisung Kwon, Nu‐Ri Park, Hyerim Kim, Hyeju Kim, Yury Gogotsi, Chong Min Koo, Myung‐Ki Kim   +7 more
wiley   +1 more source