Results 51 to 60 of about 149,288 (320)
Materials & DesignA “renaissance” of sapphire is regarded as one of the most significant tendencies of modern materials science. But sapphire has almost no plasticity at room temperature, making its surface finishing a formidable challenge.
Junyun Chen +4 more
doaj +1 more source
, 2015 We present the characterization of 8-12 GHz whispering gallery mode resonators machined in high-quality sapphire crystals elaborated with different growth techniques.
Dubois, Benoit +3 more
core +3 more sources
Strain-stress study of AlxGa1-xN/AlN heterostructures on c-plane sapphire and related optical properties [PDF]
, 2019 This work presents a systematic study of stress and strain of AlxGa1-xN/AlN with composition ranging from GaN to AlN, grown on a c-plane sapphire by metal-organic chemical vapor deposition, using synchrotron radiation high-resolution X-ray diffraction ...
Chung, T. F. +7 more
core +3 more sources
Clean‐Limit 2D Superconductivity in a Thick Exfoliated Kagome Film
Advanced Functional Materials, EarlyView.This study reports clean‐limit 2D superconductivity in a thick kagome system, analogous to the 3D case. It observes a drop in superfluid stiffness near the superconducting transition and a cusp‐like feature in the angular dependence of the upper critical field.
Fei Sun +3 more
wiley +1 more source
Ionization behavior and dynamics of picosecond laser filamentation in sapphire
Opto-Electronic Advances, 2019 Currently, laser-induced structural modifications in optical materials have been an active field of research. In this paper, we reported structural modifications in the bulk of sapphire due to picosecond (ps) laser filamentation and analyzed the ...
Amina, Ji Lingfei, Yan Tianyang, Ma Rui
doaj +1 more source
Investigation of a direction sensitive sapphire detector stack at the 5 GeV electron beam at DESY-II
, 2015 Extremely radiation hard sensors are needed in particle physics experiments to instrument the region near the beam pipe. Examples are beam halo and beam loss monitors at the Large Hadron Collider, FLASH or XFEL.
Afanaciev, K. +8 more
core +1 more source
Advanced Functional Materials, EarlyView.Thermal transport in Ru and W thin films is studied using steady‐state thermoreflectance, ultrafast pump–probe spectroscopy, infrared‐visible spectroscopy, and computations. Significant Lorenz number deviations reveal strong phonon contributions, reaching 45% in Ru and 62% in W.
Md. Rafiqul Islam +14 more
wiley +1 more source
Output Power Monitoring of Ultraviolet Light-Emitting Diode via Sapphire Substrate
Photonics, 2020 Ultraviolet (UV) light plays an important role in air/water/surface sterilization now. Maintaining a certain light intensity is often required to attain the targeted effect. In this paper, on-chip power monitoring of a UV-A light-emitting diode (LED) via
Ching-Hua Chen +5 more
doaj +1 more source
Study on Gemological Characteristics of Blue Sapphires from Baw-Mar Mine, Mogok, Myanmar
Crystals, 2021 This paper employs an X-ray powder crystal diffractometer (XRD), an X-ray fluorescence spectrometer (XRF), an ultraviolet-visible-near infrared spectrometer (UV-Vis-NIR), a Fourier infrared spectrometer (FTIR), and a laser Raman spectrometer to ...
Siming Chen +4 more
doaj +1 more source
Heteroepitaxy of Group IV-VI Nitrides by Atomic Layer Deposition
, 2013 Heteroepitaxial growth of selected group IV-VI nitrides on various orientations of sapphire (\alpha-Al2O3) is demonstrated using atomic layer deposition.
Becker, Nicholas G. +7 more
core +1 more source