Now showing items 311-319 of 319
Room-temperature luminescence of excitons in ZnO/(Mg,Zn)O multiple-quantum wells on lattice-matched substrates
We report on the optical properties of ZnO/(Mg, Zn)O multiple quantum wells (MQWs) on lattice-matched ScAlMgO4 substrates fabricated by laser molecular-beam epitaxy. As the well layer thickness decreased down to 7 Å, the ...
Stimulated emission induced by exciton–exciton scattering in ZnO/ZnMgO multiquantum wells up to room temperature
The mechanism of ultraviolet stimulated emission was investigated in ZnO/ZnMgO multiquantum wells. Stimulated emission induced by exciton–exciton scattering occurred throughout a range of temperatures from 5 K to room ...
Optical transitions in GaInNAs/GaAs multiquantum wells with varying N contents investigated by photoluminescence excitation spectroscopy
We report on the nitrogen-concentration dependence of optical transitions between quantized states of electrons and holes in GaInNAs/GaAs multi-quantum wells. Using low-temperature photoluminescence excitation spectroscopy, ...
Digital holography for MEMS application
Studies on digital holographic microscopy for full field high resolution 3-D profiling of MEMS and micro-devices are presented. Applications for thin film thickness measurement and studies on a MEMS accelerometer are presented.
Spectrophotometric study of fluorescence sensing and selective binding of biochemical substrates by 2,2'-bridged biso(β-cyclodextrin) and its water-soluble fullerene conjugate
A bis(β-cyclodextrin)-fullerene conjugate (3) linked at the secondary hydroxyl side was prepared in a good ...
The varieties for some Specht modules
J. Carlson introduced the cohomological and rank variety for a module over a finite group algebra. We give a general form for the largest component of the variety for the Specht module for the partition (pp) of p2 restricted ...
Identification of discontinuous coefficients in elliptic problems using total variation regularization
We propose several formulations for recovering discontinuous coefficients in elliptic problems by using total variation (TV) regularization. The motivation for using TV is its well-established ability to recover sharp ...
Relation between bare lattice coupling and MS̅ coupling at one loop with general lattice fermions
A compact general integral formula is derived from which the fermionic contribution to the one-loop coefficient in the perturbative expansion of the MS̅ coupling in powers of the bare lattice coupling can be extracted. It ...
Temperature dependence of near ultraviolet photoluminescence in ZnO/(Mg, Zn)O multiple quantum wells
We report on temperature dependence of excitonic photoluminescence (PL) from ZnO/(Mg, Zn)O multiple quantum wells (MQWs). Two kinds of MQWs having different barrier heights grown by laser molecular-beam epitaxy showed ...