Results 71 to 80 of about 11,806 (297)

Bandgap‐Engineered AlGaAs/GaAs Heterostructures for Wavelength‐Selective Dual‐Polarity Photoelectrochemistry

Advanced Functional Materials, EarlyView.
Bandgap‐engineered AlGaAs/GaAs heterostructures exhibit wavelength‐selective dual‐polarity photoelectrochemistry, switching from photocathodic to photoanodic response depending on excitation wavelength. The polarity transition is governed by band‐selective absorption, built‐in electric‐field‐driven carrier transport, and interfacial charge‐transfer ...
Yukai Mao, Lipin Chen, Jules Courtin, Siyu Lin, Gangri Cai, Yan Zhu, Yoan Léger, Nicolas Bertru, Jinshi Zhao, Charles Cornet   +9 more
wiley   +1 more source

On the Accuracy of Factory-Calibrated Low-Cost Soil Water Content Sensors

Sensors, 2019
Soil water content (SWC) monitoring is often used to optimize agricultural irrigation. Commonly, capacitance sensors are used for this task. However, the factory calibrations have been often criticized for their limited accuracy. The aim of this paper is
Jesús María Domínguez-Niño, Heye Reemt Bogena, Johan Alexander Huisman, Bernd Schilling, Jaume Casadesús   +4 more
doaj   +1 more source

Development of the epoxy composite complex permittivity and its application in wind turbine blades

, 2010
PhDOffshore wind farm structures may have the potential to affect marine navigation and communication systems by reflecting radar signals. With ever increasing size of wind turbines it is necessary to better understand the influence of radar signals on
Hu, Dawei
core  

Correction of Temperature and Electrical Conductivity Effects on Dielectric Permittivity Measurements with ECH(2)O Sensors

, 2011
The measurement accuracy of low-cost electromagnetic soil water content sensors is often deteriorated by temperature and soil bulk electrical conductivity effects.
Vrba, J., Rosenbaum, U., Vereecken, H., Huisman, J.A., Bogena, H.R.   +4 more
core   +1 more source

Interface Effects in Ultrathin Silicon on Insulator Films

Advanced Functional Materials, EarlyView.
This work establishes a systematic framework to discriminate how bulk and interface phenomena affect charge transport in ultrathin P‐doped silicon‐on‐insulator (SOI) films. For Si films below 15 nm, electrical characterization demonstrates that interface states drive charge transport, shifting the metal‐insulator transition (MIT) critical dopant ...
Andrea Pulici, Gabriele Seguini, Fabiana Taglietti, Roman Gumeniuk, Riccardo Chiarcos, Michele Laus, Johannes Heitmann, Marco Fanciulli, Michele Perego   +8 more
wiley   +1 more source

Determination of Permittivity of Dielectric Analytes in the Terahertz Frequency Range Using Split Ring Resonator Elements Integrated with On-Chip Waveguide

Sensors, 2020
We investigate the use of finite-element simulations as a novel method for determining the dielectric property of target materials in the terahertz (THz) frequency range using split-ring resonator (SRR) sensing elements integrated into a planar Goubau ...
Sae June Park, John Cunningham
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Modified Split Ring Resonators Sensor for Accurate Complex Permittivity Measurements of Solid Dielectrics

, 2020
In this paper, a sensor using modified Split Ring Resonators (SRRs) is designed, simulated, fabricated, and used for advanced investigation and precise measurements of the real part and imaginary part solid dielectrics’ permittivity.
Iulia Andreea Mocanu, Amer Abbood al-Behadili, Mihaela Pantazica, Norocel Codreanu   +3 more
core   +1 more source

Directional Flow of Confined Polaritons in CrSBr

Advanced Materials, EarlyView.
CrSBr, a layered magnetic semiconductor, naturally channels self‐hybridized excitonpolaritons into highly directional flow. Its intrinsic optical anisotropy, high refractive index, and strong lightmatter coupling enable long‐range guided modes along the a‐axis, with propagation lengths set by their excitonphoton admixture.
Pratap Chandra Adak, Sichao Yu, Jaime Abad‐Arredondo, Biswajit Datta, Andy Cruz, Sorah Fischer, Kseniia Mosina, Zdeněk Sofer, Antonio I. Fernández‐Domínguez, Francisco J. Garcia‐Vidal, Vinod M. Menon   +10 more
wiley   +1 more source

Design and analysis of quad-band metamaterial absorber for permittivity sensing with phase evolved equivalent circuit analysis

Ain Shams Engineering Journal
This article proposes a metamaterial absorber (MMA) based sensor. MMA applications have received significant interest across multiple domains, including their use in sensors, wireless communication, detectors, emitters, antenna design, and spatial light ...
Shihabun Sakib, Ahasanul Hoque, Mohammad Tariqul Islam, Abdulmajeed M. Alenezi, Mohamed S. Soliman, Haitham Alsaif   +5 more
doaj   +1 more source