Linear and nonlinear intersubband optical absorption coefficient and refractive index change in n-type δ-doped GaAs structure

2013 ◽  
Vol 294 ◽  
pp. 361-367 ◽  
Author(s):  
Emine Ozturk ◽  
Yasin Ozdemir
Keyword(s):  
Refractive Index ◽  
Optical Absorption ◽  
Absorption Coefficient ◽  
Refractive Index Change ◽  
Optical Absorption Coefficient ◽  
Index Change ◽  
Gaas Structure ◽  
Linear And Nonlinear ◽  
Intersubband Optical Absorption

INTERSUBBAND OPTICAL ABSORPTION COEFFICIENTS AND REFRACTIVE INDEX CHANGES OF AN ELLIPSOIDAL FINITE POTENTIAL QUANTUM DOT

2010 ◽  
Vol 19 (01) ◽  
pp. 131-143 ◽  
Author(s):  
G. REZAEI ◽  
M. R. K. VAHDANI ◽  
M. BARATI
Keyword(s):  
Refractive Index ◽  
Light Intensity ◽  
Optical Absorption ◽  
Quantum Dot ◽  
Absorption Coefficient ◽  
Optical Absorption Coefficient ◽  
Matrix Formalism ◽  
Ellipsoidal Quantum Dot ◽  
Index Changes ◽  
Intersubband Optical Absorption

Intersubband optical absorption coefficient and refractive index changes of a weakly prolate ellipsoidal quantum dot, using the compact-density matrix formalism and iterative method, are investigated. In this regard, the linear and nonlinear intersubband optical absorption coefficient and refractive index changes of a GaAs / Al x Ga 1-x As ellipsoidal quantum dot, as functions of the dot radius, ellipticity constant, stoichiometric ratio and incident light intensity are calculated. The results indicate that absorption coefficient and refractive index changes strongly depend on the light intensity, size and geometry of the dot and structure parameters such as aluminium concentration in GaAs / Al x Ga 1-x As structures.

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