Results 191 to 200 of about 25,571,688 (374)

Engineering Thermal Emission with Enhanced Emissivity and Quality Factor Using Bound States in the Continuum and Electromagnetically Induced Absorption

Advanced Optical Materials, EarlyView.
A metal‐based thermal metasurface supporting bound states in the continuum is demonstrated and experimentally shown to achieve a record‐high quality factor of 202 and high emissivity of 0.82. The design offers thermally stable, narrowband mid‐infrared emission, making it ideal for high‐precision gas sensing applications.
Guodong Zhu, Ikjun Hong, Kewei Li, Theodore Anyika, Maxwell T. Ugwu, J. Ryan Nolen, Mingze He, Joshua D. Caldwell, Justus C. Ndukaife   +8 more
wiley   +1 more source

Development of High‐Performance Multilayer Monochromators

Advanced Optical Materials, EarlyView.
Detailed insights into the optical and multilayer design of Double Multilayer Monochromators (DMM) are presented and fully characterized, including key optimization strategies and solutions to fabrication challenges. By integrating in‐house Ion Beam Figuring and a high uniformity multilayer coating process, the developed DMMs achieve high reflectivity,
Wadwan Singhapong, Arindam Majhi, Wai Jue Tan, Vishal Dhamgaye, Riley Shurvinton, Paresh Pradhan, Igor Dolbnya, Lucia Alianelli, Chris Bowen, Alexander J. G. Lunt, Hongchang Wang, Kawal Sawhney   +11 more
wiley   +1 more source

Satellite Communication Systems [PDF]

, 1995
openaire   +1 more source

Performance improvement analysis for the Apollo unified S-band system Final report, Sep. 1968 - Aug. 1970 [PDF]

Communications system analyses techniques for Apollo unified S band ...
Sheldon, R. D.
core   +1 more source

Extended‐Range Thermometry via Dual Er Fluorescence of Oxyfluoride Glass‐Ceramic Optical Fibers

Advanced Optical Materials, EarlyView.
A dual‐channel Yb3+‐Er3+‐based optical fiber thermometer combines visible upconversion and infrared photoluminescence for wide‐range temperature sensing. Yb3+/Er3+‐doped LaF3 or NaLuF4 nanocrystals embedded in transparent glass‐ceramic optical fibers enable reliable operation from room temperature up to 800 K, offering enhanced sensitivity and spectral
Giulio Gorni, Mercedes Sedano, Marcin Kochanowicz, Dominik Dorosz, Carlos Zaldo, María Jesús Pascual   +5 more
wiley   +1 more source

Photonic Hybrid Integration: Strategies and Promises of Advanced Additive Manufacturing

Advanced Optical Materials, EarlyView.
Heterogeneous photonic integration combines wafer bonding, transfer printing, and advanced multi‐photon lithography to realize compact, adaptable photonic systems. This review highlights breakthroughs in hybrid materials, metrology, and 4D printing, revealing how the convergence of traditional and emerging fabrication unlocks scalable, high‐performance
Zhitian Shi, Huiyu Huang, Richard Penty, Qixiang Cheng   +3 more
wiley   +1 more source

Optimization approach for solving problems in signal processing and communications systems [PDF]

, 2008
Wing-Kuen Ling
openalex  

Sub‐THz Multifunctional Metasurfaces for Independent Transmission or Reflection Phase Manipulation

Advanced Optical Materials, EarlyView.
This article presents a rigorous analysis, design, and characterization of a novel sub‐THz metalens and reflective metasurface. Unlike bulky optical systems, the proposed thin, planar metasurface enables dual‐band full‐space wavefront control, via low‐loss transmission and reflection phase tuning, offering compact integration and improved ...
Bilal Ouardi, Orestis Koutsos, Olivier de Sagazan, Malo Robin, Ronan Sauleau, Antonio Clemente   +5 more
wiley   +1 more source

Laser communications system with drones as relay medium for healthcare applications. [PDF]

PeerJ Comput Sci
Sait A, Al-Hadhrami T, Saeed F, Basurra S, Qasem SN.   +4 more
europepmc   +1 more source

Ring systems for digital communications: new concepts and results

, 1981
M. Schlatter
openalex   +2 more sources