Results 161 to 170 of about 19,256 (232)

Nonlinear Transmission of Strong THz‐Electric Fields Through Thin Gold Films

Advanced Optical Materials, EarlyView.
Gold is is the prime metal for imaging THz radiation. This study demonstrates that the interaction of strong THz pulses with gold becomes nonlinear at certain peak THz‐electric field strengths. The strong fields change the electron density of states which contributing to the absorption of the propagating THz pulse.
Rokas Jutas, Jonas Grumm, Yannic U. Staechelin, Audrius Pugžlys, Andrius Baltuška, Andreas Knorr, Holger Lange   +6 more
wiley   +1 more source

Synergistic Effect of Compositional Engineering and Graded Heterojunction Formation in Tin‐Halide Perovskites for Near‐Infrared Photodetectors

Advanced Optical Materials, EarlyView.
The compositional engineering of Sn‐halide perovskite with alkylammonium chloride, combined with graded heterojunction formation using fullerene, is shown to significantly enhance crystallinity and reduce trap densities. Consequently, the resulting photodetectors achieve a 63.4% external quantum efficiency and a specific detectivity of 1.38 × 1011 ...
Jongmin Lee, Hansol Park, Seung Yoon Shin, Seon‐Jeong Lim, Hyeong Ju Eun, Bum Ho Jeong, Sanghyuk Park, Jongchul Lim, Jong H. Kim, Kyu‐Tae Lee, Hui Joon Park   +10 more
wiley   +1 more source

Ka-Band Reflectarray with Cylindrical Dielectric Unit Cells: Optimized Additive Manufacturing and High-Permittivity Material Characterization. [PDF]

Sensors (Basel)
Beccaria M, Massaccesi A, Lumia M, Addamo G, Freni A, Pirinoli P.   +5 more
europepmc   +1 more source

Estimation of relative permittivity for measuring soil texture-dependent water content by GNSS-IR

Daiki Kobayashi, Shinsuke Aoki, Naoto Sato, Yuichi Maruo, Shunsuke Kodaira, Kosuke Noborio   +5 more
openalex   +1 more source

Chiral Metasurfaces with Multidimensional Tunability for Optical Chiral States

Advanced Optical Materials, EarlyView.
A novel bilayer perovskite chiral metasurface enables tunable transitions between BIC‐associated vortex centres and circularly polarized states via rotational symmetry control. Breaking rotational symmetry and applying in situ rotation to the upper layer allows precise, omnidirectional tuning of C points in momentum space. This evolution forms a Möbius‐
Dayang Lin, Abbas Ghaffari, Qing Gu
wiley   +1 more source

The Influence of Space Radiation on the Relative Permittivity of Dielectrics

, 2020
Siyu Song, Hongfei chen, Xiangqian Yu, Qiugang Zong   +3 more
openalex   +1 more source

Cloaking and Antennas: From Theoretical Paradigms to Next‐Generation Intelligent Systems

Advanced Optical Materials, EarlyView.
The inception of electromagnetic cloaking sparked an immediate question: Can antennas be made invisible? Two decades later, this review charts the intertwined progress of major cloaking strategies (from transformation optics to scattering cancellation), metasurface technology, and their application to antennas, revealing how AI‐enabled devices are ...
Helen Guo, Xun Li
wiley   +1 more source

An optimized sliding rail-assisted micrometer system for sensing volume measurement of open-ended coaxial probes in breast cancer dielectric property analysis. [PDF]

Front Bioeng Biotechnol
Chen S, Lu Z, Huang Q, Zhao G, Sun Z, Zhou J, Liao Y.   +6 more
europepmc   +1 more source

Directional Light Scattering In Mie‐Resonant Si Particles With Ultra‐Thin Au Shells

Advanced Optical Materials, EarlyView.
Si@Au core‐shell particles have been produced to study their ability to directionally scatter light. We found that the heavily reported particulate shells do not overlap the electric and magnetic dipoles well, where continuous shells have better overlap. Experimental analyses, including nanomaterial characterization, EELS and single‐particle dark‐field
Emmanuel O. Idowu, Lucien Roach, Kevin O’ Connor, Jonathan G. C. Veinot, Sabrina Lacomme, Julien Proust, Jérôme Plain, Xiaoyan Li, Mathieu Kociak, Alexandre Baron, Virginie Ponsinet, Peter Wiecha, Glenna L. Drisko   +12 more
wiley   +1 more source

Microwave imaging for human brain stroke detection using frequency domain inverse modelling & phantom experiments. [PDF]

Sci Rep
Rana SP, Davis JG, Khalil K, O'Toole M, Watson S, Liang S, Parry-Jones A, Daniels DJ, Peyton AJ.   +8 more
europepmc   +1 more source