Results 51 to 60 of about 8,154 (256)

A ground-to-GEO-to-LEO satellite optical wireless communication link based on a spectrally efficient and secure modulation scheme

Frontiers in Physics
Optical wireless communication (OWC) offers significant advantages over traditional radio frequency systems due to its high bandwidth, ease of deployment, license-free operation, immunity to electromagnetic interference, and inherent security benefits ...
Chen Xu, Umair Ali Khan, Salman Ghafoor, Jawad Mirza, Abdulah Jeza Aljohani, Imran Aziz   +5 more
doaj   +1 more source

In-plane reconfigurable beamforming for optical inter-satellite links based on PCM metasurface

Journal of Optics
We present a planar beamforming metasurface that, unlike conventional architectures, generates optical beams through in-plane excitation rather than out-of-plane illumination.
A. di Toma, G. Brunetti, Caterina Ciminelli   +2 more
semanticscholar   +1 more source

Fluorinated Deep Eutectic Gel Electrolytes with Simultaneously Enhanced Mechanical Strength and Ionic Conductivity for Solid‐State Lithium Metal Batteries

Advanced Materials, EarlyView.
The synergistic integration of rigid polyacrylamide (PAM) and flexible poly(N,N‐dimethylacrylamide) (PDMA) phases offers exceptional toughness to suppress lithium dendrites, simultaneously enhancing mechanical strength and ionic conductivity. ABSTRACT Gel polymer electrolytes for lithium‐metal batteries face an inherent trade‐off between mechanical ...
Hao Long, Yuhao Liang, Ting He, Xueming Chen, Zimo Huang, Hao Chen, Shanqing Zhang   +6 more
wiley   +1 more source

Queuing Delay Analysis for Wavelength Routing Optical Satellite Networks Over Dual-Layer Constellation

IEEE Photonics Journal
Optical satellite networks (OSN) utilizing wavelength division multiplexing (WDM) inter-satellite links (ISLs) and wavelength routing is becoming a new trend in constructing high-speed, large-capacity, and low-latency global network systems.
Jingkai Yang, Qiwen Ran, Jing Ma
doaj   +1 more source

Unveiling α‐MoO3 as a High‐Index, Low‐Loss Anisotropic Material: Bridging the Gap From Mid‐Infrared to Ultraviolet Nanophotonics

Advanced Materials, EarlyView.
α‐MoO3 is established as a high‐index, low‐loss anisotropic platform bridging mid‐infrared polaritonics and ultraviolet‐visible nanophotonics. Spectroscopic ellipsometry and calculations reveal refractive indices exceeding 3.9, with the largest in‐plane birefringence among transparent layered crystals at 425–500 nm, enabling zero‐order UV waveplates ...
Adilet N. Toksumakov, Dmitriy V. Grudinin, Georgy A. Ermolaev, Alexey P. Tsapenko, Anton A. Minnekhanov, Konstantin V. Kravtsov, Nikolay V. Pak, Arslan B. Mazitov, Andrey A. Vyshnevyy, Aleksandr S. Slavich, Ivan A. Kruglov, Gleb I. Tselikov, Aleksey V. Arsenin, Kostya S. Novoselov, Valentyn S. Volkov   +14 more
wiley   +1 more source

Optical Frequency Comb Multiplexing for Precision Ranging and High-Rate Communication in Space-Borne Gravitational Wave Detection

IEEE Photonics Journal
Future space-based gravitational wave observatories, such as LISA and TianQin, require inter-satellite laser links that simultaneously support ultra-precise ranging, low-noise scientific phase measurements, and high-integrity data communication ...
Xiaoyang Guo, Panpan Wang, Hanzhong Wu, Chenggang Shao, Kai Luo   +4 more
doaj   +1 more source

Chiral Altermagnetic Magnetoelectrics

Advanced Materials, EarlyView.
In this work, we introduce a previously unexplored class of magnetoelectric materials, which we term chiral altermagnetic magnetoelectrics, in which structural chirality and Néel‐vector‐driven polarization are intrinsically coupled in nonpolar altermagnetic systems.
Chengwu Xie, Weizhen Meng, Zhenzhou Guo, Xiaodong Zhou, Shifeng Qian, Tie Yang, Wenhong Wang, Zhenxiang Cheng, Xiaotian Wang   +8 more
wiley   +1 more source

Engineering the Assembly Freedom of Donor–Acceptor Type Self‐Assembled Monolayers Toward Efficient and Stable Flexible Perovskite Photovoltaics

Advanced Materials, EarlyView.
Assembly freedom engineering breaks the vertical alignment constraint of donor–acceptor self‐assembled monolayers, tuning their assembly freedom to achieve quasi‐random molecular orientation. This strategy simultaneously boosts interfacial charge transport and mechanical robustness, enabling high‐efficiency and mechanically stable flexible perovskite ...
Biao Zhou, Guosen Zhang, Hao Wang, Juntao Zhao, Ruijia Zhang, Hong Zhang, Mingwei An, Yue Wang, Yang Wang, Wallace C. H. Choy   +9 more
wiley   +1 more source

Autonomous and Earth-Independent Orbit Determination for a Lunar Navigation Satellite System

Aerospace
In recent years, the number of expected missions to the Moon has increased significantly. With limited terrestrial-based infrastructure to support this number of missions, as well as restricted visibility over intended mission areas, there is a need for ...
Joshua J. R. Critchley-Marrows, Xiaofeng Wu, Yosuke Kawabata, Shinichi Nakasuka   +3 more
doaj   +1 more source

A Case Study of an Hybrid RF and Optical Inter-Satellite Link Terminal to Enhance Optical Pointing

2024 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit)
The attitude determination and control system of a satellite plays a crucial role, especially in optical communication systems due to the narrow field-of-view of the laser. In the last years, the space ecosystem has shown a large interest in optical technology due to its high speed, reduced size, weight, and power, and reliable communications link ...
Fernández Niño, Elena, Fraire, Juan A., Figuerola Fernández, Sergi, Camps Carmona, Adriano José, Ruiz de Azua, Joan Adria   +4 more
openaire   +2 more sources