Results 111 to 120 of about 24,613 (311)
Velocity‐Tunable Exciton‐Photon Hybridization in Cathodoluminescence
Advanced Functional Materials, EarlyView.Transition‐radiation resonances in suspended thin crystals hybridise with excitonic transitions under free‐electron excitation. By tuning the electron energy, the photonic resonances are continuously detuned across the exciton states, enabling controllable exciton–photon hybridisation below the diffraction limit without altering the system geometry ...
Sven Ebel +4 more
wiley +1 more source
Advanced ScienceAchieving high‐performance dielectric materials remains a significant challenge due to the inherent trade‐offs between high energy storage density and low energy loss.
Yipin Cheng +6 more
doaj +1 more source
Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes
Advanced Functional Materials, EarlyView.We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar +13 more
wiley +1 more source
A beam steering technique using dielectric wedges. [PDF]
, 1995 The thesis describes a method of' beam steering aimed at producing a useful amount of deflection of an antenna beam from boresight, by a simple and Inexpensive method.
Khan, M.R.
core
EXICITATION OF WHISPERING GALLERY MODES IN A DISK PLANAR DIELECTRIC RESONATOR BY A COUPLING SLOT
Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2017 The spectral and energy characteristics of disk planar dielectric resonator (DR) with high-order whispering gallery modes (WGMs) were investigated in Ka-band.
A, Ye. Kogut +4 more
doaj
Materials & DesignThe development of broadband, high-performance electromagnetic (EM) wave absorbers in the millimeter-wave (mmWave) band requires optimizing both magnetic and dielectric losses, presenting significant challenges.
Jae Ryung Choi +5 more
doaj +1 more source
Advances in Electrical and Electronic Engineering, 2016 The importance of nanoparticles in controlling physical properties of polymeric nanocomposite materials leads us to study effects of these nanoparticles on electric and dielectric properties of polymers in industry In this research, the dielectric ...
Ahmed Thabet Mohamed, Youssef Mobarak
doaj +1 more source
Role of loss in all-dielectric metasurfaces
Optics Express, 2018 Arrays of dielectric cylinders support two fundamental dipole active eigenmodes, which can be manipulated to elicit a variety of electromagnetic responses in all-dielectric metamaterials. Dissipation is a critical parameter in determining functionality; the present work varies material loss to explore the rich electromagnetic response of this class of ...
Andrew Cardin, Kebin Fan, Willie Padilla
openaire +2 more sources
An All‐Textile, Mechano‐Capacitive Subtle Movement Sensor
Advanced Functional Materials, EarlyView.A robust all‐textile capacitive sensor is introduced for measuring subtle body movements without long‐term degradation. By separating mechanical deformation from electrical sensing elements, accuracy, responsiveness, and durability are improved. Simple fabrication methods are presented, electrode effects are analyzed, and performance is validated ...
Easa AliAbbasi +4 more
wiley +1 more source
مجلة النهرين للعلوم الهندسية, 2014 This paper discussed the effect of frequency on dielectric properties of different weight fraction of Cu powder reinforced epoxy composite materials. Dielectric properties of epoxy material was reinforced with (0, 5, 15, 30, 45) % weight fraction of Cu ...
Walaa W. Jameel
doaj