Results 21 to 30 of about 32,968 (189)

Focusing Microwaves in the Fresnel Zone With a Cavity-Backed Holographic Metasurface

open access: yesIEEE Access, 2018
We present the design and experimental demonstration of a cavity-backed, holographic metasurface capable of focusing microwaves in the Fresnel zone. The circular cavity consists of two stacked plates: microwaves are injected into the bottom plate via a ...
Vinay R. Gowda   +4 more
doaj   +1 more source

Improvement of Heat Dissipation in Ag/Ni Substrates for Testing Cu-TiO2/TiO2-Modified Filters Using SERS Spectroscopy

open access: yesCrystals, 2023
Surface-enhanced Raman scattering (SERS) spectroscopy is used to investigate a composition of wash swabs from the Cu-TiO2/TiO2-modified filters with disinfecting ability.
Hanna Bandarenka   +11 more
doaj   +1 more source

2D Ray Tracing Analysis of a Dynamic Metasurface Antenna as a Smart Motion Detector

open access: yesIEEE Access, 2019
We present a ray-tracing analysis of a smart motion detector based on a dynamically reconfigurable metasurface antenna (DMA). A DMA consists of an array of metamaterial radiators excited by a single-port waveguide or cavity.
Oren S. Mizrahi   +4 more
doaj   +1 more source

Fourier Accelerated Multistatic Imaging: A Fast Reconstruction Algorithm for Multiple-Input-Multiple-Output Radar Imaging

open access: yesIEEE Access, 2017
Multiple-input-multiple-output (MIMO) radar image processing presents problems difficult to address by modifying conventional monostatic radar methods as Fourier range migration. When the distance between the transmitter and receiver is comparable to the
Daniel L. Marks   +2 more
doaj   +1 more source

Wet Chemical Synthesis and Characterization of Au Coatings on Meso- and Macroporous Si for Molecular Analysis by SERS Spectroscopy

open access: yesCrystals, 2022
Porous silicon (PS) is a promising material for nanostructure fabrication providing a precise control over its size, shape, and spatial distribution.
Siarhei Zavatski   +4 more
doaj   +1 more source

Plasmon-enhanced generation of non-classical light [PDF]

open access: yes, 2018
Strong light-matter interactions enabled by surface plasmons have given rise to a wide range of photonic, optoelectronic and chemical functionalities.
Bozhevolnyi, Sergey I.   +2 more
core   +2 more sources

Bright Single-Photon Emitting Diodes Based on the Silicon-Vacancy Center in AlN/Diamond Heterostructures

open access: yesNanomaterials, 2020
Practical implementation of many quantum information and sensing technologies relies on the ability to efficiently generate and manipulate single-photon photons under ambient conditions. Color centers in diamond, such as the silicon-vacancy (SiV) center,
Igor A. Khramtsov, Dmitry Yu. Fedyanin
doaj   +1 more source

Software Calibration of a Frequency-Diverse, Multistatic, Computational Imaging System

open access: yesIEEE Access, 2016
We demonstrate a technique for calibrating a frequency-diverse, multistatic, computational imaging system. A frequency-diverse aperture enables an image to be reconstructed primarily from a set of scattered field measurements taken over a band of ...
Okan Yurduseven   +5 more
doaj   +1 more source

Hybrid Electro-Optical Pumping of Active Plasmonic Nanostructures

open access: yesNanomaterials, 2020
Surface plasmon polaritons (SPPs) offer a unique opportunity to overcome the diffraction limit of light. However, this opportunity comes at the cost of the strong absorption of the SPP field in a metal, which unavoidably limits the SPP propagation length
Andrey A. Vyshnevyy, Dmitry Yu. Fedyanin
doaj   +1 more source

Waveguide effective plasmonics with structure dispersion

open access: yesNanophotonics, 2021
Plasmonic phenomena on the surface between metal and dielectric have received extensive attention, and have boosted a series of exciting techniques.
Qin Xu   +5 more
doaj   +1 more source

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