Effects of inelastic capture, tunneling escape, and quantum confinement on surface acoustic wave-dragged photocurrents in quantum wells

2008 ◽  
Vol 103 (8) ◽  
pp. 083714 ◽  
Author(s):  
Danhong Huang ◽  
Godfrey Gumbs ◽  
M. Pepper
Keyword(s):  
Acoustic Wave ◽  
Quantum Wells ◽  
Surface Acoustic Wave ◽  
Quantum Confinement

Mechanisms of exciton photoluminescence quenching in the electric field of a standing surface acoustic wave

2019 ◽  
Vol 33 (06) ◽  
pp. 1950032
Author(s):  
D. V. Gulyaev ◽  
K. S. Zhuravlev
Keyword(s):  
Acoustic Wave ◽  
Electric Field ◽  
Quantum Wells ◽  
Surface Acoustic Wave ◽  
Impact Ionization ◽  
Interface Roughness ◽  
Nonradiative Recombination ◽  
Recombination Centers ◽  
Subsequent Capture ◽  
The Impact

Mechanisms of exciton photoluminescence (PL) quenching in the longitudinal electric field of a standing surface acoustic wave (SAW) have been studied by the example of type II GaAs/AlAs superlattices (SLs). Such SLs with a long lifetime of nonequilibrium carriers have allowed examining the influence of the SAW electric field on the excitonic PL both under the continuous and impulse laser excitations. It has been found that the mechanisms of the interaction of excitons and a SAW electric field depend upon the kinetic energy of excitons and carriers. As for hot excitons and carriers, the standing SAW electric field causes the impact ionization of excitons with a subsequent capture of free carriers at the nonradiative recombination centers, which results in a decrease in the steady-state exciton PL. As for cold excitons and carriers, the impact of excitons with the carriers accelerated by the SAW electric field results mainly in exciton delocalization from the levels of quantum wells formed due to interface roughness with a subsequent capture of excitons at the nonradiative recombination centers, which leads to the acceleration of the PL kinetics.

Enhancement of photocurrent in InGaN/pseudo-AlIGaN multi quantum wells by surface acoustic wave

2019 ◽  
Author(s):  
Byung-Guon Park ◽  
Reddeppa Maddaka ◽  
Moon-Deock Kim ◽  
Woo-Chul Yang ◽  
Deuk-Young Kim ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Quantum Wells ◽  
Surface Acoustic Wave

Spatially modulated photoluminescence properties in dynamically strained GaAs/AlAs quantum wells by surface acoustic wave

2012 ◽  
Vol 100 (16) ◽  
pp. 162109 ◽  
Author(s):  
Tetsuomi Sogawa ◽  
Haruki Sanada ◽  
Hideki Gotoh ◽  
Hiroshi Yamaguchi ◽  
Paulo V. Santos
Keyword(s):  
Acoustic Wave ◽  
Quantum Wells ◽  
Surface Acoustic Wave ◽  
Photoluminescence Properties

STUDY OF DEFECTS IN a-Ge AND a-GeHxUSING SURFACE ACOUSTIC WAVE TECHNIQUE

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-365-C4-368
Author(s):  
K. L. Bhatia ◽  
M.v. Haumeder ◽  
S. Hunklinger
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Wave Technique

Powder Transport by Surface Acoustic Wave Actuator using Bragg Reflection

2014 ◽  
Vol 134 (12) ◽  
pp. 1934-1935
Author(s):  
Tsunemasa Saiki ◽  
Yuya Matsui ◽  
Yasuto Arisue ◽  
Yuichi Utsumi ◽  
Akinobu Yamaguchi
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Bragg Reflection
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