Free carrier absorption in quantum well in consideration of the interaction with impurities

2nd International Symposium "Optics and its Applications"

Gevorgyan, A.H.^1 ; Kazaryan, E.M.^1 ; Kostanyan, A.A.^1

Institute of Mathematics and High Technologies, Russian-Armenian University, Hovsep Emin Street, Yerevan

0051, Armenia^1

关键词: Absorption co-efficient;    Analytical expressions;    Free carrier absorption;    Frequency characteristic;    Ionized impurities;    Parabolic quantum wells;    Scattering matrix elements;    Screened Coulomb potentials;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/672/1/012008/pdf
DOI  :  10.1088/1742-6596/672/1/012008

来源: IOP

【 摘 要 】

Intrasubband transitions caused by light absorption in a parabolic quantum well is considered taking into account the scattering by ionized impurity centers. To calculate the scattering matrix element Born approximation is used, and the interaction with the impurity is discribed via screened Coulomb potential. An analytical expression for the absorption coefficient is obtained based on the the initial absorption of a photon and a further scattering on ionized impurity center. Absorption coefficient frequency characteristics and dependence on the width of the quantum well is examined.