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We calculated analytic expressions for the absorption coe-cient (ACF) of a weak electromagnetic wave (EMW) by conflned electrons in cylindrical quantum wires (CQW) in the presence of laser radiation by using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering. The ACF of a weak EMW depends on the intensity E01 and frequency ›1 of the external laser radiation (~ E1 = ~ E01 sin(›1t+'1)); the intensity E02 and frequency ›2 of the weak EMW ( ~ E2 = ~ E02 sin(›2t)), the temperature T of the system and the radius R of CQW. Then, the analytic results are numerically calculated and discussed for GaAs=GaAsAl CQW. The numerical results show that the ACF of a weak EMW in a CQW can have negative values. So, in the presence of laser radiation, under proper conditions, the weak EMW is increased. This is difierent from the similar problem in bulk semiconductors and from the case of the absence of laser radiation.

progress in electromagnetics research m. pier m

CALCULATION ABSORPTION COEFFICIENT OF A WEAK ELECTROMAGNETIC WAVE BY CONFINED ELECTRONS IN CYLINDRICAL QUANTUM WIRES IN THE PRESENCE OF LASER RADIATION BY USING THE QUANTUM KINETIC EQUATION