Measurements of the Electric Field of Zero-Point Optical Phonons in GaAs Quantum Wells Support the Urbach Rule for Zero-Temperature Lifetime Broadening

2015 ◽  
Vol 114 (4) ◽  
Author(s):  
Rupak Bhattacharya ◽  
Richarj Mondal ◽  
Pradip Khatua ◽  
Alok Rudra ◽  
Eli Kapon ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Zero Point ◽  
Optical Phonons ◽  
Zero Temperature ◽  
Urbach Rule

ELECTRIC FIELD EFFECTS ON POLARONS WITH SPATIALLY DEPENDENT MASS IN PARABOLIC QUANTUM WELLS

2004 ◽  
Vol 18 (22) ◽  
pp. 2991-2999 ◽  
Author(s):  
FENG-QI ZHAO ◽  
ZI-ZHENG GUO
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Effective Mass ◽  
Energy Levels ◽  
Longitudinal Optical ◽  
Optical Phonons ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Dependent Mass ◽  
Parabolic Quantum Wells

The free polaron energy levels in finite GaAs / Al x Ga 1-x As parabolic quantum wells have been investigated by a modified variational method. The effect of the electric field, the electron-phonon interaction including the longitudinal optical phonons and the four branches of interface optical phonons, and the effect of spatial dependent effective mass have been considered in the calculation. The dependence of the energies of free polarons on the alloy composition x is given. The numerical results for finite GaAs / Al x Ga 1-x As parabolic quantum wells are obtained and discussed. The results show that the effect of the electric field and the interface optical phonons as well as the longitudinal optical phonons on the energy levels is obvious. One can find that the effect of the spatially dependent effective masses on the energy levels in finite parabolic quantum wells is considerable except for large well width. Thus, the electron-phonon interaction and the effect of the spatially dependent effective mass should not be neglected for the study of the electron state problem in finite parabolic quantum wells.

scholarly journals Optical properties of c-Plane InGaN/GaN single quantum wells as a function of total electric field strength

2019 ◽  
Vol 58 (SC) ◽  
pp. SCCB09 ◽  
Author(s):  
George M. Christian ◽  
Stefan Schulz ◽  
Simon Hammersley ◽  
Menno J. Kappers ◽  
Martin Frentrup ◽  
...  
Keyword(s):  
Optical Properties ◽  
Field Strength ◽  
Electric Field ◽  
Quantum Wells ◽  
Electric Field Strength ◽  
Single Quantum ◽  
Total Electric Field

Electric field induced phase transition in first order ferroelectrics with large zero point energy

2008 ◽  
Vol 387 (1) ◽  
pp. 115-122 ◽  
Author(s):  
C.L. Wang ◽  
J.C. Li ◽  
M.L. Zhao ◽  
J.L. Zhang ◽  
W.L. Zhong ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
Zero Point ◽  
Zero Point Energy ◽  
Point Energy ◽  
First Order

Intersubband radiation in weakly bound superlattice structures with wide quantum wells in a transverse electric field

2007 ◽  
Vol 34 (7) ◽  
pp. 189-193
Author(s):  
N. V. Dyakonova ◽  
O. A. Klimenko ◽  
W. Knap ◽  
Ya. A. Mityagin ◽  
V. N. Murzin ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Wells ◽  
Transverse Electric ◽  
Transverse Electric Field ◽  
Weakly Bound ◽  
Superlattice Structures

Generation of TeraHertz radiation assisted by optical phonons in nitride-based quantum wells and heterolayers

2008 ◽  
Vol 5 (1) ◽  
pp. 236-239
Author(s):  
P. Shiktorov ◽  
E. Starikov ◽  
V. Gružinskis ◽  
L. Varani ◽  
C. Palermo ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Terahertz Radiation ◽  
Optical Phonons
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