Results 71 to 80 of about 1,717 (189)

A Highly Sensitive Gold-Coated Photonic Crystal Fiber Biosensor Based on Surface Plasmon Resonance

Photonics, 2017
In this paper, we numerically demonstrate a two-layer circular lattice photonic crystal fiber (PCF) biosensor based on the principle of surface plasmon resonance (SPR).
Md. Rabiul Hasan, Sanjida Akter, Ahmmed A. Rifat, Sohel Rana, Sharafat Ali   +4 more
doaj   +1 more source

Using Finite Element and Eigenmode Expansion Methods to Investigate the Periodic and Spectral Characteristic of Superstructure Fiber Bragg Gratings

Sensors, 2016
In this study, a numerical simulation method was employed to investigate and analyze superstructure fiber Bragg gratings (SFBGs) with five duty cycles (50%, 33.33%, 14.28%, 12.5%, and 10%). This study focuses on demonstrating the relevance between design
Yue-Jing He, Wei-Chih Hung, Zhe-Ping Lai
doaj   +1 more source

Focused Thermal Emission From a Radiative Metasurface

Small Structures, Volume 7, Issue 3, March 2026.
MIM‐type metasurfaces, consisting of metal‐dielectric‐metal nanostructures, are promising materials for achieving highly efficient photothermal conversion. By introducing a structural arrangement inspired by metalens, which can focus light using a two‐dimensional lens, into this structure, we have achieved filter‐less light‐focusing operation.
Tsuyoshi Kawaida, Kazuki Wada, Kazuma Sekiya, Megumi Tanaka, Thoko Ogata, Yasutaka Matsuo, Saulius Juodkazis, Yoshiaki Nishijima   +7 more
wiley   +1 more source

Implementation of an Approximate Conformal UPML in 2-D DGTD

International Journal of Antennas and Propagation, 2017
Using the numerical discrete technique with unstructured grids, conformal perfectly matched layer (PML) absorbing boundary in the discontinuous Galerkin time-domain (DGTD) can be set flexibly so as to save lots of computing resources.
Linqian Li, Bing Wei, Qian Yang, Debiao Ge   +3 more
doaj   +1 more source

Extremely low loss optical waveguide for terahertz pulse guidance

Results in Physics, 2019
This study proposed a dielectric terahertz (THz) D-shape core based photonic crystal fiber (PCF) with very low level of effective material loss (EML) for efficient THz pulse propagation.
Bikash Kumar Paul, Touhid Bhuiyan, Lway Faisal Abdulrazak, Kaushik Sarker, Md. Maruf Hassan, S. Shariful, Kawsar Ahmed   +6 more
doaj   +1 more source

Highly birefringent, low loss single-mode porous fiber for THz wave guidance

Results in Physics, 2018
In this letter, authors have proposed a circular structured photonic crystal fiber for low-loss terahertz waveguiding. Transmission characteristics of the photonic crystal fiber (PCF) have been conducted by implementing a perfectly matched layer (PML) in
K.M. Samaun Reza, Bikash Kumar Paul, Kawsar Ahmed   +2 more
doaj   +1 more source

Simplified Tunnel–Soil Model Based on Thin-Layer Method–Volume Method–Perfectly Matched Layer Method

Applied Sciences
In order to analyze the ground vibration responses induced by the dynamic loads in a tunnel, this paper proposes a new simplified tunnel–soil model.
Yu Wang, Mengfan Zhou, Yanmei Cao, Xiaoxi Wang, Zhe Li, Meng Ma   +5 more
doaj   +1 more source

High-Precision Simulation of Discontinuous Galerkin Algorithm in Dispersive Media for 3-D Ground-Penetrating Radar Based on CFS-PML

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Ground-penetrating radar (GPR) has emerged as a critical tool for subsurface characterization due to its three-dimensional imaging capabilities in complex geological environments. Nevertheless, existing numerical methods for modeling electromagnetic wave
Shuo Liu, Deshan Feng, Xun Wang
doaj   +1 more source

A High-Order Time and Space Formulation of the Unsplit Perfectly Matched Layer for the Seismic Wave Equation Using Auxiliary Differential Equations (ADE-PML)

Computer Modeling in Engineering & Sciences, 2010
Unsplit convolutional perfectly matched layers (CPML) for the velocity and stress formulation of the seismic wave equation are classically computed based on a second-order finite-difference time scheme. However it is often of interest to increase the order of the time-stepping scheme in order to increase the accuracy of the algorithm. This is important
Martin, Roland, Komatitsch, Dimitri, Gedney, Stephen D., Bruthiaux, Emilien   +3 more
openaire   +1 more source

Domain Decomposition CN-FDTD with Unsplit-Field PML for Time-Reversed Channel Analysis [PDF]

Radioengineering, 2018
In this paper, an efficient domain decomposition (DD) technique is introduced into the implicit Crank-Nicolson finite-difference time-domain (CN-FDTD) method to analyze the channel characteristics of time reversal (TR) waves. As an unconditionally stable
X. K. Wei, W. Shao, X. H. Wang, B.-Z. Wang   +3 more
doaj