Results 51 to 60 of about 3,954 (258)

Two‐Dimensional Isotropic Spatial Differentiation Through Complete Polarization Control

Advanced Optical Materials, EarlyView.
This work enables two‐dimensional isotropic spatial differentiation at planar interfaces over a wide range of incident angles by extending the output polarization from linear to elliptical. The choice of incident angle can be used to balance broader spectral response at low angles and higher edge‐detection efficiency at larger angles.
Doyoon Lee, Minkyung Kim
wiley   +1 more source

Millimeter waves in communication systems as a prospect for the development and application of robotic means and complexes

Физика волновых процессов и радиотехнические системы
Background. Millimeter-wave communication systems are becoming more and more relevant in conditions of saturation of the low-frequency spectrum and growing requirements for data transmission speed.
Vladislav R. Skrynskij
doaj   +1 more source

Deterministic Transferable Planar Dielectric Mirrors for Investigating Strong Light–Matter Coupling

Advanced Optical Materials, EarlyView.
Transferable dielectric distributed Bragg reflectors enable the deterministic assembly of high‐quality planar microcavities while maintaining the intrinsic properties of quantum materials during fabrication. The resulting structures exhibit robust exciton‐photon coupling in monolayer WS2${\rm WS}_{2}$ from cryogenic to room temperature, establishing a ...
Atanu Patra, Subhamoy Sahoo, Johannes Düreth, Simon Betzold, Sven Höfling   +4 more
wiley   +1 more source

Enhancement of Circular Dichroism in Chiral Dielectric Metasurfaces by Ion Beam Irradiation

Advanced Optical Materials, EarlyView.
Ion beam irradiation enables post fabrication tuning of dissipative losses in chiral dielectric metasurfaces composed of C4 symmetric silicon nanostructures. By tailoring the absorption toward critical coupling condition, circular dichroism is enhanced from 0.70 to 0.85, demonstrating a versatile route for maximizing optical chirality and polarization ...
Anna Fitriana, Katsuya Tanaka, Lukas Raam Jaeger, Martin Hafermann, Thomas Pertsch, Carsten Ronning, Isabelle Staude   +6 more
wiley   +1 more source

Dielectric Permittivity Tensor of Muscovite for Next Generation All Van Der Waals Broadband Photonic Components

Advanced Optical Materials, EarlyView.
Low‐index and low‐loss vdW muscovite represents an emerging robust dielectric platform for the creation of next‐generation all‐vdW nanophotonic architectures. Its utilization as a low‐index building‐block in all‐vdW multilayers enables extreme optical contrast when paired with MoS2, paving the way to the realization of few‐layer ultrathin DBS ...
Meri H. Hayrapetyan, Maksim L. Sargsyan, Davit A. Karakhanyan, Ani P. Khachatryan, Maria A. Levonyan, Dmitrii Litvinov, Maciej Koperski, Artsruni V. Margaryan, Makars Šiškins, Konstantin S. Novoselov, Davit A. Ghazaryan   +10 more
wiley   +1 more source

Built-In Self-Test of Millimeter-Wave Integrated Front-End Circuits: How Far Have We Come?

IEEE Access
With automotive radar and 5G/6G communications, mass-market applications for millimeter-wave circuits in silicon technologies have been identified or established in recent years.
Yannick Wenger, Bernd Meinerzhagen, Vadim Issakov   +2 more
doaj   +1 more source

Quasi Optical Multi-Ray Model For Wireless Communication Link in Millimeter Wavelengths

MATEC Web of Conferences, 2018
The spectrum of millimeter waves lay above 30GHz. The band between 30GHz up to 300GHz is called Extremely High Frequencies (EHF). This wide spectrum is relatively free of users and have recently became relevant for realizations of wireless communications
Rapaport Liat, Etinger Ariel, Litvak Boris, Pinhasi Gad, Pinhasi Yosef   +4 more
doaj   +1 more source

Interference Reduction by Millimeter Wave Technology for 5G-Based Green Communications

IEEE Access, 2016
The primary goal of this paper is the optimization of data transmissions and connections between 5G base stations (BSs) as well as the improvement of access technologies and transmission methods in consideration of massive multi-input multi-output, a key
Tin-Yu Wu, Tse Chang
doaj   +1 more source

On‐Chip Microheater‐Based Back‐End‐of‐Line Compatible Synthesis of VO2 Films for Reconfigurable Silicon Photonics

Advanced Optical Materials, EarlyView.
A back‐end‐of‐line‐compatible microheater platform enables localized synthesis and reversible switching of high‐quality VO2 directly on silicon photonic chips. The approach overcomes conventional thermal‐budget and patterning constraints while delivering device performance comparable to high‐temperature‐grown films, providing a scalable pathway for ...
Khoi Phuong Dao, Siddharth Kumar, Zhiyun Xu, Junhe Zhang, Qinyuan Xue, Rui Chen, Shriram Ramanathan, Juejun Hu   +7 more
wiley   +1 more source

Real-Time Positioning Based on Millimeter Wave Device to Device Communications

IEEE Access, 2016
Current generation mobile wireless communication networks are not suitable for real-time positioning applications because timing information is not readily available.
Xuerong Cui, Thomas Aaron Gulliver, Houbing Song, Juan Li   +3 more
doaj   +1 more source