Results 11 to 20 of about 217,295 (341)

Characterization of output circular polarization degree in lowcost asymmetric metasurfaces [PDF]

EPJ Web of Conferences, 2022
Addition of asymmetry in plasmonic nanostructures can lead to chiro-optical phenomena, usually monitored as different absorption of left and right polarization, i.e. circular dichroism.
Petronijevic Emilija, Belardini Alessandro, El-ansary Zakaria, Brioual Bilal, Prasath Ram Kumar Hari, Cesca Tiziana, Scian Carlo, Mattei Giovanni, Sibilia Concita   +8 more
doaj   +1 more source

Chiral Dual-Core Photonic Crystal Fiber for an Efficient Circular Polarization Beam Splitter

Photonics, 2023
As a function of a circular polarization beam splitter (CPBS), combining a linear polarization beam splitter with a quarter-wave plate results in a polarization error in a circular polarization fiber-optic circuit.
She Li, Yibing Li, Hongwei Lv, Changtong Ji, Hongze Gao, Qian Sun   +5 more
doaj   +1 more source

Photonic Bandgaps of One-Dimensional Photonic Crystals Containing Anisotropic Chiral Metamaterials

Photonics, 2022
Conventional photonic bandgaps (PBGs) for linear polarization waves strongly depend on the incident angle. Usually, PBGs will shift toward short wavelengths (i.e., blue-shifted gaps) as the incident angle increases, which limits their applications.
Qian Wei, Jiaju Wu, Zhiwei Guo, Xiaotian Xu, Ke Xu, Yong Sun, Yunhui Li, Haitao Jiang, Hong Chen   +8 more
doaj   +1 more source

Active Control of the THz Wave Polarization State by an Electronically Controlled Graphene Composite Metasurface

Frontiers in Physics, 2021
Active control of terahertz (THz) wave polarization state is of great significance for sensitive detection, imaging and communication. Here, a tunable THz quarter wave plate is designed by electronically controlling a composite metasurface consisting of ...
Guocui Wang, Guocui Wang, Bin Hu, Muhammad Ismail Khan, Yan Zhang   +4 more
doaj   +1 more source

Circular Polarization near the Tight Focus of Linearly Polarized Light

Photonics, 2022
We have considered the tight focusing of light with linear polarization. Using the Richards–Wolf formalism, it is shown that before and after the focal plane, there are regions in which the polarization is circular (elliptical).
Sergey S. Stafeev, Anton G. Nalimov, Alexey A. Kovalev, Vladislav D. Zaitsev, Victor V. Kotlyar   +4 more
doaj   +1 more source

Circular Polarization Antenna-Filter

Advanced Electromagnetics, 2019
A two-function filtering antenna device in the 1-2 GHz band is investigated. The device radiates or receives electromagnetic waves of circular polarization and simultaneously performs the function of a second-order bandpass filter.
S. Bankov, A. Davydov, V. Kalinichev, P. Viugin, A. Kurushin   +4 more
doaj   +1 more source

Optical Polarization Sensor Based on a Metalens

Sensors, 2022
We investigated an optical microsensor of the polarization state of a laser light based on a metalens. In contrast to known polarization sensors based on metasurfaces that deflect different polarization types using various angles to the optical axis, the
Victor Kotlyar, Anton Nalimov, Alexey Kovalev, Sergey Stafeev   +3 more
doaj   +1 more source

Low Loss Transmission Circular Polarizer for KU Band Application

Sukkur IBA Journal of Emerging Technologies, 2018
Low loss transmission circular polarizer is proposed for Ku band applications. The designed structure consists of two closely cross metallic strips which are based on FSS for 15.25 GHz and 15.28 GHz applications.
Farman Ali Mangi
doaj   +1 more source

Dual-band and high-efficiency metasurface-based circular-to-linear polarization converter.

PLoS ONE, 2023
In this paper, to achieve circular-to-linear polarization conversion, a novel polarization converter based on an anisotropic metasurface is proposed.
Baoqin Lin, Wenzhun Huang, Jianxin Guo, Yanwen Wang, Rui Zhu, Xiang Ji   +5 more
doaj   +1 more source

Rapidly Evolving Circularly Polarized Emission during the 1994 Outburst of GRO J1665-40 [PDF]

, 2002
We report the detection of circular polarization during the 1994 outburst of the Galactic microquasar GRO J1655-40. The circular polarization is clearly detected at 1.4 and 2.4GHz, but not at 4.8 and 8.4GHz, where its magnitude never exceeds 5 mJy.
Bower, Brunthaler, Cheng, Conway, D. C. Hannikainen, Fender, Fender, Frater, Hannikainen, Harmon, Hjellming, Hjellming, Homan, Homan, J.-P. Macquart, K. Wu, Kaiser, Komesaroff, Legg, Macquart, Macquart, Macquart, Marscher, Melrose, Orosz, Pacholczyk, R. J. Sault, Rayner, Roberts, Ruszkowski, Sault, Shahbaz, Soria, Stevens, Tingay, Wardle, Wu   +36 more
core   +2 more sources