Nonlinear Carrier Relaxation in a Single GaAs Self-organized Quantum Dot

2002 ◽  
Vol 737 ◽  
Author(s):  
T. Kuroda ◽  
S. Sanguinetti ◽  
F. Minami ◽  
M. Gurioli ◽  
K. Watanabe ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Quantum Dot ◽  
Time Resolution ◽  
Delay Time ◽  
Emission Spectra ◽  
Excitation Intensity ◽  
Carrier Relaxation ◽  
Self Organized ◽  
Carrier Scattering

ABSTRACTWe resolved a photoemission signal from a single self-organized GaAs/Al0.3Ga0.7As quantum dot (QD) with picosecond time resolution. The emission spectra consisting of the multiexciton structures are observed to depend on the delay time and the excitation intensity. Through the analysis we can determine the carrier relaxation time as a function of population of photoinjected carriers. Enhancement of the intra-dot carrier relaxation is demonstrated to be due to the carrier-carrier scattering inside a single QD.

Investigation of carrier relaxation dynamics in single CdSe/ZnSe self-organized quantum dot by time-resolved micro-photoluminescence

2001 ◽  
Vol 30 (5) ◽  
pp. 448-452 ◽  
Author(s):  
Takeshi Ota ◽  
Yasuhiro Murase ◽  
Kenzo Maehashi ◽  
Hisao Nakashima ◽  
Chikara Watatani ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Carrier Relaxation ◽  
Self Organized ◽  
Carrier Relaxation Dynamics

Emission spectra and mode structure of InAs/GaAs self-organized quantum dot lasers

1998 ◽  
Vol 73 (7) ◽  
pp. 969-971 ◽  
Author(s):  
L. Harris ◽  
D. J. Mowbray ◽  
M. S. Skolnick ◽  
M. Hopkinson ◽  
G. Hill
Keyword(s):  
Quantum Dot ◽  
Emission Spectra ◽  
Quantum Dot Lasers ◽  
Mode Structure ◽  
Self Organized

Intersublevel Relaxation Dependence of Carrier Hopping in Self-Organized InAs Quantum Dot Heterostructures

2004 ◽  
Vol 99-100 ◽  
pp. 41-48
Author(s):  
Y.F. Wu ◽  
H.T. Shen ◽  
Y.H. Lin ◽  
C.C. Cheng ◽  
R.M. Lin ◽  
...  
Keyword(s):  
Chemical Vapour ◽  
Emission Spectra ◽  
Growth Conditions ◽  
Rate Equations ◽  
Organic Chemical ◽  
Temperature Dependent ◽  
Carrier Relaxation ◽  
Pl Spectra ◽  
Self Organized ◽  
Three Samples

The temperature dependence of the photoluminescence (PL) emission spectra of self-organized InAs/GaAs quantum dots (QDs) grown under different growth conditions in the range 20-300K has been investigated. Three InAs QD samples were grown on (100) 2º-tilted toward (111)A Si-doped GaAs substrates by metal-organic chemical vapour epitaxy (MOVPE), with various size uniformities and dot densities. Observing the measured PL spectra at 20K, the differences caused by size uniformities among the three samples were obvious. The PL spectra were simulated with rate equations, taking into account the carrier relaxation between the first excited state and the ground state. Interestingly, the calculated relaxation lifetimes at 20K were 198ps, 139ps and 54ps for the samples. The temperature dependent PL spectra were also simulated using the same model. Based on the calculated values of temperature dependent relaxation lifetimes, the differences in changes with temperature among the three samples are discussed. The results are consistent with the thermal redistribution effect.

Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

2020 ◽  
pp. 144-148
Keyword(s):  
Quantum Dot ◽  
Delay Time ◽  
Chaos Synchronization ◽  
Optical Feedback ◽  
Light Emitting Diode ◽  
Feedback Effect ◽  
Complete Synchronization ◽  
Light Emitting ◽  
Coupling Methods ◽  
Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

Vertical and lateral ordering in self-organized quantum dot superlattices

2001 ◽  
Vol 9 (1) ◽  
pp. 149-163 ◽  
Author(s):  
G. Springholz ◽  
M. Pinczolits ◽  
V. Holy ◽  
S. Zerlauth ◽  
I. Vavra ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Self Organized ◽  
Lateral Ordering

3D hexagonal versus trigonal ordering in self-organized PbSe quantum dot superlattices

2004 ◽  
Vol 21 (2-4) ◽  
pp. 611-614 ◽  
Author(s):  
R.T Lechner ◽  
T.U Schülli ◽  
V Holy ◽  
J Stangl ◽  
A Raab ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Self Organized

Excitation transfer in self-organized asymmetric quantum dot pairs

1998 ◽  
Vol 58 (16) ◽  
pp. R10151-R10154 ◽  
Author(s):  
R. Heitz ◽  
I. Mukhametzhanov ◽  
P. Chen ◽  
A. Madhukar
Keyword(s):  
Quantum Dot ◽  
Excitation Transfer ◽  
Self Organized ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum
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