Reducing exciton-longitudinal-optical phonon interaction with shrinking ZnO quantum dots

2007 ◽  
Vol 91 (18) ◽  
pp. 181913 ◽  
Author(s):  
Wei-Tse Hsu ◽  
Kuo-Feng Lin ◽  
Wen-Feng Hsieh
Keyword(s):  
Quantum Dots ◽  
Optical Phonon ◽  
Longitudinal Optical ◽  
Longitudinal Optical Phonon ◽  
Phonon Interaction ◽  
Zno Quantum Dots

DEPENDENCE OF EXCITON FORMATION ON ITS CENTER-OF-MASS MOMENTUM IN QUANTUM WELLS

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3660-3663 ◽  
Author(s):  
I.-K. OH ◽  
JAI SINGH
Keyword(s):  
Quantum Wells ◽  
Optical Phonon ◽  
Acoustic Phonon ◽  
Center Of Mass ◽  
Longitudinal Optical ◽  
Longitudinal Optical Phonon ◽  
Deformation Potential ◽  
Phonon Interaction ◽  
Carrier Temperature ◽  
Comprehensive Study

We present a comprehensive study of the process of exciton formation due to exciton-phonon interaction. Using the exciton-phonon interaction arising from deformation potential, piezoelectric, and polar couplings, we have calculated the rate of formation of an exciton as a function of carrier densitiies, temperatures, and center-of-mass momentum ( K ‖) in quantum wells. Our results show that excitons are dominantly formed at non-zero K ‖, which agrees very well with experiments. The formation of an exciton due to emission of longitudinal optical phonon is found to be more efficient at relatively small values of K ‖, and that due to acoustic phonon emission is more efficient at relatively large K ‖ values for carrier temperature Te-h≲50 K.

scholarly journals Anomalous quantum confinement of the longitudinal optical phonon mode in PbSe quantum dots

2013 ◽  
Vol 88 (11) ◽  
Author(s):  
J. Habinshuti ◽  
O. Kilian ◽  
O. Cristini-Robbe ◽  
A. Sashchiuk ◽  
A. Addad ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Phonon ◽  
Quantum Confinement ◽  
Phonon Mode ◽  
Longitudinal Optical ◽  
Longitudinal Optical Phonon ◽  
Optical Phonon Mode

Confinement induced decrease of the exciton-longitudinal optical phonon coupling in GaN quantum dots

1999 ◽  
Vol 75 (13) ◽  
pp. 1935-1937 ◽  
Author(s):  
Peter Ramvall ◽  
Satoru Tanaka ◽  
Shintaro Nomura ◽  
Philippe Riblet ◽  
Yoshinobu Aoyagi
Keyword(s):  
Quantum Dots ◽  
Optical Phonon ◽  
Longitudinal Optical ◽  
Longitudinal Optical Phonon ◽  
Phonon Coupling
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