Optical absorption in a CdS/CdSe/CdS asymmetric quantum well

2020 ◽  
Vol 742 ◽  
pp. 137129
Author(s):  
R. Arulmozhi ◽  
A. John Peter ◽  
Chang Woo Lee
2019 ◽  
Vol 33 (26) ◽  
pp. 1950301 ◽  
Author(s):  
Yu Liu ◽  
Youbin Yu

Electric field influences on the electronic states and the optical absorption in an asymmetrical quantum well with semiparabolic potential are investigated. The formula for the absorption coefficients in this asymmetrical quantum well with electric field are deduced by applying iterative method and density-matrix approach. The results are discussed with GaAs/AlGaAs materials and show that the external electric field has a significant effect on the electronic states and absorption coefficients of asymmetric quantum wells.


2019 ◽  
Vol 383 (34) ◽  
pp. 125983 ◽  
Author(s):  
Chaojin Zhang ◽  
Cong Min ◽  
Bo Zhao

2011 ◽  
Vol 25 (07) ◽  
pp. 497-507 ◽  
Author(s):  
M. J. KARIMI ◽  
A. KESHAVARZ ◽  
A. POOSTFORUSH

In this work, the optical absorption coefficients and the refractive index changes for the infinite and finite semi-parabolic quantum well are calculated. Numerical calculations are performed for typical GaAs / Al x Ga 1-x As semi-parabolic quantum well. The energy eigenvalues and eigenfunctions of these systems are calculated numerically. Optical properties are obtained using the compact density matrix approach. Results show that the energy eigenvalues and the matrix elements of the infinite and finite cases are different. The calculations reveal that the resonant peaks of the optical properties of the finite case occur at lower values of the incident photon energy with respect to the infinite case. Results indicate that the maximum value of the refractive index changes for the finite case are greater than that of the infinite case. Our calculations also show that in contrast to the infinite case, the resonant peak value of the total absorption coefficient in the case of the finite well is a non-monotonic function of the semi-parabolic confinement frequency.


2003 ◽  
Vol 39 (6) ◽  
pp. 813-819 ◽  
Author(s):  
Y. Miyazaki ◽  
H. Tada ◽  
S. Tokizaki ◽  
K. Takagi ◽  
T. Aoyagi ◽  
...  

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