Results 81 to 90 of about 5,099,090 (216)
, 2010 The presented Diploma thesis deals with the computer-generated diffractive structures or rather called computer generated holograms (CGH). We follow basic principles of classical holography and in the context of which we define a synthetic holography. We
Tvarog, Drahoslav
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Metasurface‐Based Multidimensional Light‐Field Manipulation: From Technologies to Applications
Advanced Science, EarlyView.Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Heliang Yin +6 more
wiley +1 more source
JPhys PhotonicsHolographic lithography in azobenzene-containing polymers has evolved from classical interference-based surface relief grating formation into a versatile platform for maskless, all-optical, and reconfigurable surface patterning. In its current iteration,
Marcella Salvatore +1 more
doaj +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 +4 more
wiley +1 more source
COMPUTER-GENERATED HOLOGRAM ETCHED IN GAAS FOR OPTICAL INTERCONNECTION OF VLSI CIRCUITS [PDF]
, 1992 By integrating, on a wafer plane, GaAs semiconductor optoelectronic modulators and detectors with computer-generated holograms between then, the potential for in-plane interconnections is proposed.
CAREY, CD +4 more
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Scale-invariant 3D face recognition using computer-generated holograms and the Mellin transform
Opto-Electronic AdvancesWe present a novel method for scale-invariant 3D face recognition by integrating computer-generated holography with the Mellin transform. This approach leverages the scale-invariance property of the Mellin transform to address challenges related to ...
Yongwei Yao +5 more
doaj +1 more source
Computer generated holography with intensity-graded patterns
Frontiers in Cellular Neuroscience, 2016 Computer Generated Holography achieves patterned illumination at the sample plane through phase modulation of the laser beam at the objective back aperture. This is obtained by using liquid crystal-based spatial light modulators (LC-SLMs), which modulate
Rossella Conti +4 more
doaj +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 +9 more
wiley +1 more source
Far-field and Fresnel Liquid Crystal Geometric Phase Holograms via Direct-Write Photo-Alignment
Crystals, 2017 We study computer-generated geometric-phase holograms (GPHs) realized by photo-aligned liquid crystals, in both simulation and experiment. We demonstrate both far-field and Fresnel holograms capable of producing far-field and near-field images with ...
Xiao Xiang +2 more
doaj +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 +4 more
wiley +1 more source