Results 31 to 40 of about 85,177 (339)

Group-IV midinfrared plasmonics [PDF]

, 2015
The use of heavily doped semiconductors to achieve plasma frequencies in the mid-IR has been recently proposed as a promising way to obtain high-quality and tunable plasmonic materials. We introduce a plasmonic platform based on epitaxial n-type Ge grown
Baldassarre, Leonetta, Biagioni, Paolo, Calandrini, Eugenio, Frigerio, Jacopo, Gallacher, Kevin, Giliberti, Valeria, Isella, Giovanni, Millar, Ross W., Ortolani, Michele, Paul, Douglas J., Sakat, Emilie, Samarelli, Antonio   +11 more
core   +4 more sources

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

IEEE 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, Mohammadreza F. Imani, Timothy Sleasman, Okan Yurduseven, David R. Smith   +4 more
doaj   +1 more source

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

Crystals, 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, Aliaksandr Burko, Kseniya Girel, Diana Laputsko, Elizaveta Orel, Anna Mizgailo, Utkirjon Sharopov, Alise Podelinska, Uladzislau Shapel, Vladimir Pankratov, Sergei Piskunov, Dmitry Bocharov   +11 more
doaj   +1 more source

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

IEEE 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, Mohammadreza F. Imani, K. Parker Trofatter, Jonah N. Gollub, David R. Smith   +4 more
doaj   +1 more source

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

IEEE 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, Okan Yurduseven, David R. Smith   +2 more
doaj   +1 more source

Waveguide effective plasmonics with structure dispersion

Nanophotonics, 2021
Plasmonic phenomena on the surface between metal and dielectric have received extensive attention, and have boosted a series of exciting techniques.
Qin Xu, Sun Wangyu, Zhou Ziheng, Fu Pengyu, Li Hao, Li Yue   +5 more
doaj   +1 more source

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

Crystals, 2022
Porous silicon (PS) is a promising material for nanostructure fabrication providing a precise control over its size, shape, and spatial distribution.
Siarhei Zavatski, Anatoli I. Popov, Andrey Chemenev, Alma Dauletbekova, Hanna Bandarenka   +4 more
doaj   +1 more source

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

Nanomaterials, 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

Heavily-doped Germanium on Silicon with Activated Doping Exceeding 1020 cm−3 as an Alternative to Gold for Mid-infrared Plasmonics [PDF]

, 2017
Ge-on-Si has been demonstrated as a platform for Si foundry compatible plasmonics. We use laser thermal annealing to demonstrate activated doping levels >1020 cm-3 which allows most of the 3 to 20 μm mid-infrared sensing window to be covered with ...
Baldassarre, Leonetta, Ballabio, Andrea, Biagioni, Paolo, Frigerio, Jacopo, Gallacher, Kevin, Giliberti, Valeria, Huet, Karim, Isella, Giovanni, Mazzamuto, Fulvio, Milazzo, Ruggero, Napolitani, Enrico, Ortolani, Michele, Paul, Douglas J., Pellegrini, G.   +13 more
core   +1 more source

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

IEEE 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, Jonah N. Gollub, Kenneth P. Trofatter, Daniel L. Marks, Alec Rose, David R. Smith   +5 more
doaj   +1 more source