Results 81 to 90 of about 3,811,787 (369)

Enhanced Terahertz Spectroscopy of a Monolayer Transition Metal Dichalcogenide

Advanced Functional Materials, EarlyView.
An ad‐hoc engineered metallic surface is employed to perform enhanced terahertz spectroscopy of a monolayer transition metal dichalcogenide (TMD). Thanks to a local absorption boost of 104, this technique allows for the extraction of the phonon resonance features and effective permittivity of the 2D material, paving the way for the rational design of ...
Xin Jin, Vincenzo Aglieri, Young‐Gyun Jeong, Atiye Pezeshki, Lilian Skokan, Mostafa Shagar, Yuechen Jia, Pablo Bianucci, Andreas Ruediger, Emanuele Orgiu, Andrea Toma, Luca Razzari   +11 more
wiley   +1 more source

Broadband Complex Permittivity and Electric Modulus Spectra for Dielectric Materials Research

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, 2022
Measurement of the complex permittivity of a substance in a wide frequency range, for example, from 10 mHz to 100 kHz, provides useful information on the dielectric properties of the substance.
Y. Ohki
semanticscholar   +1 more source

Size-Dependent Bruggeman Approach for Dielectric-Magnetic Composite Materials

, 2004
Expressions arising from the Bruggeman approach for the homogenization of dielectric-magnetic composite materials, without ignoring the sizes of the spherical particles, are presented. These expressions exhibit the proper limit behavior.
Akhlesh Lakhtakia, Bruggeman, Chapra, Grimes, Grimes, Lakhtakia, Lakhtakia, Lakhtakia, Lorenz, Michel, Neelakanta, Prinkey, Tom G. Mackay, Walser, Ward   +14 more
core   +1 more source

The Microscopic Origin of the Macroscopic Dielectric Permittivity of Crystals: A Mathematical Viewpoint [PDF]

, 2010
The purpose of this paper is to provide a mathematical analysis of the Adler-Wiser formula relating the macroscopic relative permittivity tensor to the microscopic structure of the crystal at the atomic level.
Cancès, Eric, Lewin, Mathieu, Stoltz, Gabriel   +2 more
core   +5 more sources

Off‐Stoichiometry Engineering of the Electrical and Optical Properties of SrNbO3 Using Oxide Molecular Beam Epitaxy

Advanced Functional Materials, EarlyView.
The plasma edge of transparent conducting oxide SrNbO3 shifts from ∼2 eV in the visible range to 1.37 eV in the near‐infrared region by off‐stoichiometry using the vacancy sites as quasi‐substitutional virtual elements. This work advances the stoichiometry engineering of perovskite oxides using oxide molecular beam epitaxy, allowing synthesis beyond ...
Jasnamol Palakkal, Alexey Arzumanov, Ruiwen Xie, Zhiyuan Li, Niloofar Hadaeghi, Thomas Wagner, Tianshu Jiang, Yating Ruan, Gennady Cherkashinin, Leopoldo Molina Luna, Hongbin Zhang, Lambert Alff   +11 more
wiley   +1 more source

Frequency-Variation Sensors for Permittivity Measurements Based on Dumbbell-Shaped Defect Ground Structures (DB-DGS): Analytical Method and Sensitivity Analysis

IEEE Sensors Journal, 2022
It is shown in this paper that a microstrip line loaded with a dumbbell-shaped defect ground structure (DB-DGS) is useful for complex permittivity measurements.
J. Muñoz-Enano, P. Vélez, M. Gil, F. Martín   +3 more
semanticscholar   +1 more source

Determination of Complex Permittivity of Low-Loss Materials From Reference-Plane Invariant Transmission/Reflection Measurements

IEEE Access, 2019
In this paper, a novel method is proposed to determine unique and stable relative complex permittivity of low-loss materials from the transmission/reflection (TR) measurements, though the positions of the materials under test are unknown.
Chuang Yang, Hui Huang
doaj   +1 more source

Compound surface-plasmon-polariton waves guided by a thin metal layer sandwiched between a homogeneous isotropic dielectric material and a periodically multilayered isotropic dielectric material

, 2015
Multiple p- and s-polarized compound surface plasmon-polariton (SPP) waves at a fixed frequency can be guided by a structure consisting of a metal layer sandwiched between a homogeneous isotropic dielectric (HID) material and a periodic multilayered ...
Chiadini, Francesco, Fiumara, Vincenzo, Lakhtakia, Akhlesh, Scaglione, Antonio   +3 more
core   +1 more source

Vivid Structural Coloration in Transparent MXene‐Cellulose Nanocrystals Composite Films

Advanced Functional Materials, EarlyView.
Vivid structural coloration in reflectance and high transparency in transmittance modes are observed in biopolymer‐layered composite films. The ultrathin multilayered structures have unique optical appearance, near‐infrared bandgap, and strong optical reflection caused by alternating MXene and cellulose nanocrystals layers with high refractive index ...
Botyo Dimitrov, Valeriia Poliukhova, Claire Joo, Madeline Buxton, Irina Roslyk, Yury Gogotsi, Jacob Crossno, Kirt A. Page, Hilmar Koerner, Dhriti Nepal, Michael E. McConney, Timothy J. Bunning, Vladimir V. Tsukruk   +12 more
wiley   +1 more source

Effect of the relative permittivity of oxides on the performance of triboelectric nanogenerators

, 2017
Since the working mechanism of triboelectric nanogenerators (TENGs) is based on triboelectrification and electrostatic induction, it is necessary to understand the effects of the inherent properties of dielectric materials on the performance of TENGs. In
Yeon Joo Kim, Jaejun Lee, S. Park, Chanho Park, Cheolmin Park, Heon-Jin Choi   +5 more
semanticscholar   +1 more source