Results 101 to 110 of about 316,392 (313)

A Free Space Optic/Optical Wireless Communication: A Survey

, 2022
Basheer Muslih Mahdi, Essa Ibrahim Essa
openalex   +2 more sources

Multiband Switchable Microwave Absorbing Metamaterials Based on Reconfigurable Kirigami–Origami

Advanced Functional Materials, EarlyView.
A reconfigurable metamaterial featuring tunable microwave‐absorbing and load‐bearing performance is proposed. Stretchable kirigami and bistable origami configurations are integrated as actuating components, and the synergistic deformation mechanisms are systematically analyzed.
Weimin Ding, Zhong Zhang, Zeang Zhao, Shengyu Duan, Panding Wang, Xiaogang Guo, Hongshuai Lei, Daining Fang   +7 more
wiley   +1 more source

Signed Optical Quadrature Spatial Modulation in Free Space Optical Communication

Guangtongxin yanjiu
【Objective】Aiming at the problems of low spectral efficiency and limited system throughput in Optical Quadrature Spatial Modulation (OQSM), a Signed Optical Quadrature Spatial Modulation (SOQSM) scheme is proposed in Free Space Optical Communication ...
ZHAO Hui, LIU Liang, HAN Lili, QIN Yulin, LI Junnan   +4 more
doaj  

Design and Modeling of the Properties of the Servomechanism for a Mobile Free Space Optical Link [PDF]

, 2014
The paper deals with the design of a tracking system determined for mobile free space optical link communication system. The paper also contains description of two-step method of the optical-axes pointing process, description of the basic properties of ...
Cizmar, J., Nemecek, J.
core   +1 more source

Higher dimensional quantum communication in a curved spacetime: an efficient simulation of the propagation of the wavefront of a photon

, 2018
A photon with a modulated wavefront can produce a quantum communication channel in a larger Hilbert space. For example, higher dimensional quantum key distribution (HD-QKD) can encode information in the transverse linear momentum (LM) or orbital angular ...
Bennett, Ekert, Hermann, Miller, Miller
core   +1 more source

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

Advanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey, Arjen van den Berg, Sandra Ruiz Gomez, Claire Donnelly, Dirk Grundler, Sam Ladak   +5 more
wiley   +1 more source

Charge‐Induced Morphing Gels for Bioinspired Actuation

Advanced Functional Materials, EarlyView.
This study introduces a novel electroactive actuation mechanism that enables the gel material to generate substantial and reversible shape‐changing while preserving topological and isochoric (volumetric) equivalence. The resultant morphing behaviors can mimic the movements of muscle‐driven organelles in nature, including cilia‐like beating and ...
Ciqun Xu, Saba Firouznia, Charl F. J. Faul, Majid Taghavi, Jonathan Rossiter   +4 more
wiley   +1 more source

4 m/100 Gb/s Optical Wireless Communication Based on Far L–Band Injection Locked Quantum-Dash Laser

IEEE Photonics Journal, 2017
An indoor 100 Gb/s free space optical communication link using an injection locked ∼1621 nm quantum-dash laser has been experimentally demonstrated.
Muhammad Talal Ali Khan, Mohamed Adel Shemis, Amr Mohamed Ragheb, Maged Abdullah Esmail, Habib Ali Fathallah, Saleh Alshebeili, Mohammed Zahed Mustafa Khan   +6 more
doaj   +1 more source

The Dynamics of Interfacial Trap States in High‐Detectivity Near‐Infrared Photomultiplication Organic Photodetectors

Advanced Functional Materials, EarlyView.
Photomultiplication organic photodetectors (PM OPDs) are an attractive strategy for health‐monitoring. Here, PM‐OPDs are reported with a specific detectivity of 5.7 × 1012 Jones and external quantum efficiency values of 3500% under −10 V. The dynamics of carrier trapping in these devices are elucidated through trap selective spectroscopical techniques.
Marie Houot, Zhuoran Qiao, Beier Hu, Davide Nodari, Francesco Furlan, Filip Aniés, Yicheng Yang, Martin Heeney, Artem A. Bakulin, Nicola Gasparini   +9 more
wiley   +1 more source

Experimental demonstration of an indoor visible light positioning system using RGB LEDs for multi‐cell networks

The Journal of Engineering
A visible light positioning (VLP) system for multi‐cell networks based on multi‐colour LED that combines frequency division multiplexing with the received signal strength and a trilateration method is proposed. First, it employs experimental measurements
R. A. Martinez‐Ciro, F. E. Lopez‐Giraldo, J. M. Luna‐Rivera, A. M. Ramirez‐Aguilera   +3 more
doaj   +1 more source