Results 91 to 100 of about 131,690 (295)

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

Controlling the Frequency-Temperature Sensitivity of a Cryogenic Sapphire Maser Frequency Standard by Manipulating Fe3+ Spins in the Sapphire Lattice

, 2012
To create a stable signal from a cryogenic sapphire maser frequency standard, the frequency-temperature dependence of the supporting Whispering Gallery mode must be annulled.
A. E. Siegman, D. L. Creedon, D. L. Creedon, J.-M. Le Floch, K. Benmessai, L. S. Kornienko, M. E. Tobar, M. Mrad, P.-Y. Bourgeois, V. Giordano, Y. Kersalé   +10 more
core   +3 more sources

Aluminum Oxynitride‐Engineered Transparent Aluminum Nitride Resistive Memory for Low‐Leakage Multilevel Switching in Micro‐LED Pixels

Advanced Materials Technologies, EarlyView.
An AlON interfacial layer is engineered within an AlN switching layer to enable transparent RRAM with four stable resistance states. The device achieves low‐voltage multilevel switching and a high HRS, allowing precise grayscale modulation and preventing light leakage in micro‐LEDs operated at VDD = 2.7 V.
Sung Keun Choi, Ho Jin Lee, Seok Hee Hong, Jae Seong Park, Chan Ho Ryu, Kyeong Heon Kim, Tukaram D. Dongale, Tae Geun Kim   +7 more
wiley   +1 more source

Wavelength Tunability of Ion-bombardment Induced Ripples on Sapphire

, 2006
A study of ripple formation on sapphire surfaces by 300-2000 eV Ar+ ion bombardment is presented. Surface characterization by in-situ synchrotron grazing incidence small angle x-ray scattering and ex-situ atomic force microscopy is performed in order to ...
Ahmet S. Özcan, D. Peter Siddons, Gözde Özaydin, H. Johnson, Hua Zhou, J. F. Ziegler, Karl F. Ludwig, L. C. Feldman, Lan Zhou, Randall L. Headrick, S. E. Orchard, S. M. Mukhopadhyay, Yiping Wang, Yiyi Wang   +13 more
core   +1 more source

Perspective: Hollow Core Optical Fibres for Ultraviolet and Visible Wavelengths

Advanced Science, EarlyView.
Hollow core optical fibres bypass material constraints that limit optical fibres at ultraviolet and visible wavelengths. However, their challenging fabrication has limited their development, and significant gains in performance remain possible. In this perspective we outline approaches to enable the next generation of fibres for shorter wavelengths ...
Robbie Mears, Kerrianne Harrington, Jonathan C. Knight, William J. Wadsworth, James M. Stone, Tim A. Birks   +5 more
wiley   +1 more source

Disorder‐Induced Extremely Low Thermal Conductivity of Graphite Fluoride

Advanced Science, EarlyView.
This article investigates the effect of fluorination on the thermal conductivity of graphite fluoride, demonstrating the relationship between structural modification and thermal conductivity in an extreme case. The record‐low through‐plane thermal conductivity measured in exfoliated graphite fluoride flakes was found to correlate with the wide ...
Wonsik Lee, Donghoon Moon, Ziyan Qian, Jinwoo Kim, Changheon Kim, Yeojin Lee, Hyobin Yoo, Richard B. Wilson, Qiye Zheng, Gwan‐Hyoung Lee, Hyejin Jang   +10 more
wiley   +1 more source

An Integrated Programming and Development Environment for Adiabatic Quantum Optimization

, 2014
Adiabatic quantum computing is a promising route to the computational power afforded by quantum information processing. The recent availability of adiabatic hardware has raised challenging questions about how to evaluate adiabatic quantum optimization ...
Bennink, Ryan S., Billings, Jay J., D'Azevedo, Ed F., Humble, Travis S., Klymko, Christine F., McCaskey, Alex J., Seddiqi, Hadayat, Sullivan, Blair D.   +7 more
core   +1 more source

Unveiling a Bulk WTaV Multicomponent Alloy With Superior Thermal Properties and Manufacturability

Advanced Science, EarlyView.
ABSTRACT Many tungsten (W)‐based medium and high entropy alloys (HEA) demonstrate superior microstructural stability and enhanced mechanical properties as compared to pure W, effectively rendering them as viable candidate materials for extreme environments such as nuclear fusion, aerospace applications, and so on.
Ishtiaque K. Robin, Skye N. Supakul, Shalini Tripathi, Eda Aydogan, Matthew T. Vigil, Caleb Hatler, Bochuan Sun, Akshay Korpe, Enrique Martinez, Saryu J. Fensin, Dan J. Thoma, Osman El‐Atwani   +11 more
wiley   +1 more source

Origin and reduction of wakefields in photonic crystal accelerator cavities

, 2013
Photonic crystal (PhC) defect cavities that support an accelerating mode tend to trap unwanted higher-order modes (HOMs) corresponding to zero-group-velocity PhC lattice modes at the top of the bandgap.
Bauer, Carl A., Cary, John R., Werner, Gregory R.   +2 more
core   +2 more sources

Energy‐Resolved Femtosecond Dynamics of Plasmon‐Induced Hole Injection at Au/GaN Heterointerfaces

Advanced Science, EarlyView.
We reveal the spectral signature of ultrafast nonthermal hot‐hole transfer at plasmonic heterointerfaces, which reshapes hot‐carrier relaxation dynamics and significantly enhances hydrogen evolution, providing a mechanistic basis for optimizing hot‐carrier utilization in photocatalysis.
Yuying Gao, Yuxin Xie, Jonathan Diederich, Christian Höhn, Klaus Schwarzburg, Fengtao Fan, Can Li, Roel van de Krol, Dennis Friedrich   +8 more
wiley   +1 more source