Results 51 to 60 of about 39,484 (169)

A Frequency and Polarization Agile Disc Monopole Wearable Antenna for Medical Applications [PDF]

Radioengineering, 2020
A combined frequency and polarization reconfigurable textile based wearable disc monopole antenna is proposed in this paper. The antenna consists of a disc monopole as the radiator and four PIN diodes for realizing the agility property.
P. Saha, D. Mitra, S. K. Parui
doaj  

Full Stokes Mid-Wavelength Infrared Polarization Photodetector Based on the Chiral Dielectric Metasurface

Photonics
Conventional imaging techniques can only record the intensity of light while polarization imaging can record the polarization of light, thus obtaining a higher dimension of image information.
Bo Cheng, Yuxiao Zou, Guofeng Song
doaj   +1 more source

High-efficiency chiral meta-lens

Scientific Reports, 2018
We present here a compact metasurface lens element that enables simultaneous and spatially separated imaging of light of opposite circular polarization states.
Benedikt Groever, Noah A. Rubin, J. P. Balthasar Mueller, Robert C. Devlin, Federico Capasso   +4 more
doaj   +1 more source

Circular polarization measurement of γ-rays emitted from 32S(n,γ)33S reaction with polarized neutrons [PDF]

EPJ Web of Conferences
We aim to measure circular polarization of γ-rays emitted from neutron capture reactions with a pulsed neutron source for nuclear data and nuclear physics studies. A γ-ray polarimeter was developed to measure the circular polarization. One of performance
Endo Shunsuke, Fujioka Hiroyuki, Ide Ikuo, Inuma Masataka, Iwamoto Nobuyuki, Iwamoto Osamu, Kameda Kento, Kawamura Shiori, Kimura Atsushi, Kitaguchi Masaaki, Kobayashi Ryujyu, Nakamura Shoji, Oku Takayuki, Okudaira Takuya, Okuizumi Mao, Rovira Gerard, Shima Tatsushi, Shimizu Hirohiko, Takada Shusuke, Takahashi Shingo, Yoshikawa Hiromoto, Yoshioka Tamaki   +21 more
doaj   +1 more source

Broadband multifunctional polarization converter based on graphene and vanadium dioxide metasurfaces along with analytical methods

Scientific Reports
In this paper, a tunable broadband multifunctional polarization converter based on graphene and vanadium dioxide (VO2) is designed. When VO2 is in the metallic state, the structure has the functions of three-band linear to linear and two-band linear to ...
Saman Heidari, Najmeh Nozhat
doaj   +1 more source

Integrating linear and circular polarization features for PolSAR land cover classification with deep learning

International Journal of Applied Earth Observations and Geoinformation
Existing deep learning methods for ecological monitoring using polarimetric synthetic aperture radar (PolSAR) imagery primarily rely on coherency (T) or covariance (C) matrices derived from the linear polarization basis, often overlooking scattering ...
Shuaiying Zhang, Zhen Dong, Huadong Lin, Zhendong Zhang, Jinran Wu, Sinong Quan, Wentao An, Tong Li, Rajiv Pandey   +8 more
doaj   +1 more source

Optimal design of broadband linear-to-circular polarization conversion metasurface

Materials & Design
Due to their inherent defects, circular polarization discrimination methods involving amplitude-phase or axial ratio are obstacles of the computer software-based optimal design of broadband linear-to-circular (LTC) polarization conversion metasurfaces ...
Jiao Wang, Xin-Cheng Zhao, Yan-Nan Jiang, Wei-Qi Gu, Kai-Da Xu   +4 more
doaj   +1 more source

The circular-polarization phase-meter

Optics Express, 2012
A new method to measure the carrier-envelope phase (CEP) of a strong few-cycle laser pulse is introduced. The new concept relies on above threshold ionization (ATI) in circularly polarized laser fields and allows for CEP tagging every single laser pulse generated in few-cycle laser systems at multi-kHz repetition rates.
openaire   +3 more sources

Design and Performance of Broadband Dual Layer Circular Polarizer Based on Frequency Selective Surface for X-Band Applications [PDF]

Mehran University Research Journal of Engineering and Technology, 2017
A dual-layer circular polarizer based on FSS (Frequency Selective Surface) composed of two periodic strips in xoy plane. The transmission characteristic of present structure is comprehensively investigated that convert linearly polarized wave into ...
FARMAN ALIMANGI, GHULAM ALI MALLAH, SAEED AHMED KHAN   +2 more
doaj  

Synchrotron Circular Polarization in Gamma-Ray Burst Prompt Optical Emission: Relativistic Thermal Electron Contribution

The Astrophysical Journal
Synchrotron circular polarization of a nonthermal power-law electron distribution in gamma-ray bursts (GRBs) has been studied. However, some numerical simulations have shown that the resulting distribution of electrons is a combination of a thermal ...
Kangfa Cheng, Jirong Mao, Xiaohong Zhao, Hongbang Liu, Zhegeng Chen, Gaojin Yu, Zhifu Chen   +6 more
doaj   +1 more source