Dynamical Properties of Terahertz Radiation from Coherent Longitudinal Optical Phonons Confined in a GaAs/AlAs Multiple Quantum Well

2006 ◽  
Author(s):  
K. Mizoguchi ◽  
M. Nakayama ◽  
S. Saito ◽  
A. Syouji ◽  
K. Sakai
Keyword(s):  
Quantum Well ◽  
Terahertz Radiation ◽  
Multiple Quantum Well ◽  
Longitudinal Optical ◽  
Multiple Quantum ◽  
Optical Phonons ◽  
Dynamical Properties

POPULATION RELAXATION TIME OF OPTICAL PHONONS IN GaAs-AlAs MULTIPLE QUANTUM WELL STRUCTURES

1993 ◽  
Vol 07 (13n14) ◽  
pp. 887-893 ◽  
Author(s):  
K.T. TSEN ◽  
C. CHIA ◽  
J. WEST ◽  
H. MORKOC
Keyword(s):  
Relaxation Time ◽  
Quantum Well ◽  
Theoretical Calculations ◽  
Multiple Quantum Well ◽  
Relaxation Times ◽  
Experimental Results ◽  
Multiple Quantum ◽  
Optical Phonons ◽  
Quantum Well Structures ◽  
Population Relaxation

Population relaxation time of confined as well as interface optical phonons in a series of GaAs-AlAs multiple quantum well structures has been measured by picosecond time-resolved Raman spectroscopy. Our experimental results have shown that (1) within the experimental accuracy, the population relaxation time of confined optical phonons in GaAs-AlAs multiple quantum well structures is independent of GaAs well-width and is given by 6±1 ps at T=10 K; (2) the population relaxation times of both GaAs -like and AlAs -like interface optical phonons increase as GaAs well-width increases from 20 Å to 100 Å. These experimental results are compared with theoretical calculations recently carried out by Gupta and Ridley (Ref. 3).

Intense terahertz radiation from longitudinal optical phonons in GaAs∕AlAs multiple quantum wells

2005 ◽  
Vol 87 (9) ◽  
pp. 093102 ◽  
Author(s):  
K. Mizoguchi ◽  
T. Furuichi ◽  
O. Kojima ◽  
M. Nakayama ◽  
S. Saito ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Terahertz Radiation ◽  
Longitudinal Optical ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Optical Phonons
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