Results 31 to 40 of about 4,717,735 (155)

Design and Analysis of Laser to Fibre Coupling System Using Holographic Optical Element

382-390This paper focuses on design of cost effective, light – weight holographic coupler to couple laser light to optical fibre with reasonably appreciable diffraction efficiency.
Kumar Singh, Ajay, Lal Yadav, Hira, Yadav, Ajay   +2 more
core   +1 more source

Spin‐Polarized Metallic Metal−Organic Framework With High Conductivity and Half‐Metallic Behavior

Advanced Science, EarlyView.
By establishing a progression from insulating to semiconducting and ultimately to metallic MOFs, this study not only introduces a new design paradigm based on quantum spin‐polarized electronic structures, but also represents a significant breakthrough toward the realization of next‐generation conductive materials.
Saqib Kamal, Kuang‐Hsin Hsu, Arif I. Inamdar, Hemanth Kumar Bangolla, Chi‐Jia Lin, Erdembayalag Batsaikhan, Tzuoo‐Tsair Luo, Ming‐Hsi Chiang, Yen‐Hsiang Liu, Ruei‐San Chen, Batjargal Sainbileg, Michitoshi Hayashi, Chen‐Hsiung Hung, Kuang‐Lieh Lu   +13 more
wiley   +1 more source

Optical Modeling Of A Holographic Single Element Head-Mounted Display

, 2004
This paper proposes a new method to design an optically-fabricated holographic element, where the construction optical system and the playback system can be optimized jointly. The method was driven by the use of a new holographic recording material - the
Rolland, J. P., Smimov, V., Ha, Y., Glebov, L.   +3 more
core   +1 more source

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

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Holographic Optical Beam Steering Demonstration

, 2010
This project utilizes a relatively new type of holographic element called a Holographic Diffraction Grating. We used this technology to implement a new and original method of beam-steering. This report discusses the design, development, and evaluation of
Ciampa, Michael Anthony, Vranos, Nicholas Arthur, Ayers, Gabriel J   +2 more
core   +2 more sources

Broadband Near‐Field Computational Microwave Imaging Enabled by Nonperiodic Dispersive Unit‐Cell Loading in a Passive Metasurface

Advanced Electronic Materials, EarlyView.
A compact passive engineered surface converts changes in microwave frequency into many distinct illumination patterns, allowing nearby objects to be imaged without mechanical scanning, active tuning, or a large antenna array. Operating from 18 to 28 GHz, the single‐port system uses measured field patterns to reconstruct metallic targets and distinguish
Mohammed H. Arif, Firas Slewa Dawod, Henrik Jansen, Caner Kadıoğlu, Sayan Roy, Dirk Heberling, Renato Negra   +6 more
wiley   +1 more source

Interference and diffraction analysis of holographic gratings using the Finite-Difference Time-Domain method [PDF]

, 2010
The Finite-Difference Time-Domain method (FDTD) is based on a time-marching algorithm that has proven accurate in predicting microwave scattering from complicated objects.
Pérez Molina, Manuel, Beléndez, Augusto, Neipp, Cristian, Bleda, Sergio, Francés, Jorge   +4 more
core  

Microscopic applications of holographic beam shaping and studies of optically trapped aerosols [PDF]

, 2009
This thesis has two themes. Firstly, it concerns the original application of holographic beam shaping, employed through the methods associated with optical manipulation, to three microscopic fields of research.
Burnham, Daniel R.
core   +2 more sources