Optical Study of Localized and Delocalized States in GaAsN/GaAs

2003 ◽  
Vol 798 ◽  
Author(s):  
Z. Y. Xu ◽  
X. D. Luo ◽  
X. D. Yang ◽  
P. H. Tan ◽  
C. L. Yang ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Rapid Thermal Annealing ◽  
Short Pulse ◽  
Selective Excitation ◽  
Excitation Power ◽  
Pulse Excitation ◽  
Optical Study ◽  
Time Resolved ◽  
Exciton Localization ◽  
Time Resolved Photoluminescence

ABSTRACTTaking advantages of short pulse excitation and time-resolved photoluminescence (PL), we have studied the exciton localization effect in a number of GaAsN alloys and GaAsN/GaAs quantum wells (QWs). In the PL spectra, an extra transition located at the higher energy side of the commonly reported N-related emissions is observed. By measuring PL dependence on temperature and excitation power along with PL dynamics study, the new PL peak has been identified as a transition of the band edge-related recombination in dilute GaAsN alloy and delocalized transition in QWs. Using selective excitation PL we further attribute the localized emission in QWs to the excitons localized at the GaAsN/GaAs interfaces. This interface-related exciton localization could be greatly reduced by a rapid thermal annealing.

Time-resolved photoluminescence of Al-rich AlGaN/AlN quantum wells under selective excitation

2011 ◽  
Vol 8 (7-8) ◽  
pp. 2191-2193 ◽  
Author(s):  
Yoshiya Iwata ◽  
Takao Oto ◽  
Akio Kaneta ◽  
Ryan G. Banal ◽  
Mitsuru Funato ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Selective Excitation ◽  
Time Resolved ◽  
Time Resolved Photoluminescence

EXCITON LOCALIZATION IN (Cd,Zn)O EPILAYERS AND (Cd,Zn)O/(Mg,Zn)O MULTI-QUANTUM WELLS ON LATTICE-MATCHED SUBSTRATES

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3853-3856 ◽  
Author(s):  
T. MAKINO ◽  
N. T. TUAN ◽  
C. H. CHIA ◽  
Y. SEGAWA ◽  
M. KAWASAKI ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Radiative Recombination ◽  
Molecular Beam ◽  
Radiative Lifetime ◽  
Phonon Coupling ◽  
Time Resolved ◽  
Exciton Localization ◽  
Photoluminescence Studies ◽  
Time Resolved Photoluminescence ◽  
Lattice Matched

We report on optical properties of epitaxial (Cd,Zn)O layers and multi-quantum wells grown by laser molecular-beam epitaxy on lattice-matched ScAlMgO 4 substrates. Exciton-phonon coupling strength in (Cd,Zn)O layers estimated by temperature dependence of the excitonic energy was similar to that deduced in ZnO . Time-resolved photoluminescence studies were performed on the multi-quantum wells, which are almost perfectly lattice-matched (0.034%). Radiative recombination of excitons exhibits a spectral distribution of times. We found that the radiative lifetime increases linearly with temperature, showing a two-dimensional feature of excitons in quantum wells.

Evaluation of hole-spin superposition in GaAs/AlGaAs quantum wells through time-resolved photoluminescence measurements

2014 ◽  
Vol 104 (25) ◽  
pp. 252406
Author(s):  
Tetsu Ito ◽  
Hideki Gotoh ◽  
Masao Ichida ◽  
Hiroaki Ando
Keyword(s):  
Quantum Wells ◽  
Time Resolved ◽  
Time Resolved Photoluminescence

Research on the tunneling of asymmetric double quantum wells with time-resolved photoluminescence

1993 ◽  
Author(s):  
Xu G. Huang ◽  
Zhigang Cai ◽  
X. J. Zhang ◽  
Jianying Zhou ◽  
Zhenxin Yu
Keyword(s):  
Quantum Wells ◽  
Double Quantum ◽  
Time Resolved ◽  
Time Resolved Photoluminescence ◽  
Asymmetric Double Quantum Wells

Time-resolved photoluminescence measurements of InGaN light-emitting diodes, films, and multiple quantum wells

1999 ◽  
Author(s):  
Milan Pophristic ◽  
Frederick H. Long ◽  
Chuong A. Tran ◽  
Ian T. Ferguson ◽  
Robert F. Karlicek, Jr.
Keyword(s):  
Quantum Wells ◽  
Light Emitting Diodes ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Time Resolved ◽  
Light Emitting ◽  
Time Resolved Photoluminescence

Well-width dependent studies of InGaN-GaN single-quantum wells using time-resolved photoluminescence techniques

1997 ◽  
Vol 3 (3) ◽  
pp. 731-738 ◽  
Author(s):  
Chi-Kuang Sun ◽  
S. Keller ◽  
Tien-Lung Chiu ◽  
G. Wang ◽  
M.S. Minsky ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Single Quantum ◽  
Time Resolved ◽  
Time Resolved Photoluminescence
Sign in / Sign up

Export Citation Format

Share Document