Results 81 to 90 of about 38,998 (289)

Holographic analysis of diffraction structure factors

, 2002
We combine the theory of inside-source/inside-detector x-ray fluorescence holography and Kossel lines/x ray standing waves in kinematic approximation to directly obtain the phases of the diffraction structure factors.
B. Adams, B.W. Batterman, C. S. Fadley, D. K. Shuh, D. Sayre, I. A. Vartanyants, J. J. Bucher, J.A. Golovchenko, J.J. Bucher, J.M. Cowley, L. Fabris, M. A. Van Hove, M. J. Press, M. Kopecky, M. Kopecky, M. Tegze, M. Tegze, M. W. West, N. Mannella, P.M. Len, S. Marchesini, S. Marchesini, S. Marchesini, T. Gog, T. Gog, T. Hiort, W. C. Stolte, W. Shen, Z. Hussain   +28 more
core   +2 more sources

A Universal Approach to Enhancing Silicon Hot‐Carrier Photodetectors for CMOS‐Compatible SWIR Imaging

Advanced Science, EarlyView.
Silicon hot‐carrier photodetectors offer a CMOS‐compatible pathway for SWIR detection but suffer from intrinsically low quantum efficiency. Here, we introduce a quasi‐generalized antireflection coating (QARC) that universally enhances optical absorption and quantum efficiency, enabling the first CMOS‐compatible SWIR imaging with silicon hot‐carrier ...
Eui‐Hyoun Ryu, Hyun Woo Ko, Sunghyun Hwang, Nayeon Kim, Ji‐Hwan Son, Sunghyun Han, Paul Hongsuck Seo, Jisoo Hong, Sang‐Jun Kim, Seon Kyu Yoon, Min‐Chul Park, In‐Ho Lee   +11 more
wiley   +1 more source

Design and Fabrication of a Holographic Radial Polarization Converter

Photonics, 2020
Radial polarization converters can convert an incident light into a radially polarized light, which is beneficial in a variety of applications. In this paper, a new design of holographic radial polarization converter is proposed which consists of eight ...
Jing-Heng Chen, Hung-Lung Tseng, Fan-Hsi Hsu, Chien-Yuan Han, Kun-Huang Chen, Chien-Hung Yeh, Ken-Yuh Hsu   +6 more
doaj   +1 more source

Integrated Ultrasonic Platform for Bioelectronic Control through Biological Barriers Based on Metasurface

Advanced Science, EarlyView.
A metasurface‐enabled ultrasonic platform achieves precise multi‐focal control through biological barriers, real‐time physiology‐driven modulation, and simultaneous wireless power and data transmission. By unifying wavefront engineering, closed‐loop feedback, and acoustic communication, this work establishes key enabling technologies toward scalable ...
Chuanxin Zhang, Hanjie Xiao, Xue Jiang, Dean Ta   +3 more
wiley   +1 more source

Holo-U²Net for High-Fidelity 3D Hologram Generation

Sensors
Traditional methods of hologram generation, such as point-, polygon-, and layer-based physical simulation approaches, suffer from substantial computational overhead and generate low-fidelity holograms.
Tian Yang, Zixiang Lu
doaj   +1 more source

Diffraction efficiency of localized holograms in doubly doped LiNbO3 crystals [PDF]

, 2000
The diffraction efficiency of M holograms superimposed in the volume of the recording medium is proportional to 1/M^2. We present a method, based on nondestructive localized holograms in a doubly doped LiNbO3 crystal, that allows us to also record M ...
Adibi, Ali, Maravic, Irena, Moser, Christophe, Psaltis, Demetri, Schupp, Benjamin   +4 more
core  

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Hybrid holographic non-destructive test system [PDF]

, 1978
An automatic hybrid holographic non-destructive testing (HNDT) method and system capable of detecting flaws or debonds contained within certain materials are described.
Kurtz, R. L.
core   +1 more source

"Hologram" ocalałego. Rozpoznanie

Widok. Teorie i Praktyki Kultury Wizualnej, 2022
Celem artykułu jest opis i analiza USC Shoah Foundation Dimensions in Testimony - projektu zapoczątkowanego w 2012. Jest to inicjatywa mająca na celu rejestrację ocalałych w postaci hologramów 3D, a zarazem pierwszy tak interaktywny program pytań i odpowiedzi w czasie rzeczywistym wykorzystywany w narracji o Holokauście.
openaire   +2 more sources