Programme

P.16 -- Poster, VCTP-48

Date: Tuesday, 1 August 2023

Time: 08:30 - 10:00

The Nonlinear Absorption Of Strong Electromagnetic Waves In Semi-parabolic Plus Semi-inverse Squared Quantum Wells Taking Into Account The Two-Photon Absorption Process

Cao Thi Vi Ba (1), Nguyen Quang Bau (1)*, Tran Anh Tuan (1), Nguyen Dinh Nam (1)*

(1) Department of Theoretical Physics, Faculty of Physics, VNU University of Science, Vietnam National University, Hanoi, Vietnam

General analytic expressions for the nonlinear absorption coefficient (NAC) of strong electromagnetic waves (SEMW) caused by confined electrons in Semi-parabolic Plus Semi-inverse Squared Quantum Wells (SPPSISQW) are obtained by using the quantum kinetic equation (QKE) for electrons in the case of electron-optical phonon scattering. A second-order multiphoton process is included in the result. The dependence of the NAC on the amplitude E0 and the photon energy ћΩ of an SEMW and the temperature T for a specific GaAs/GaAsAl SPPSISQW is achieved by using a numerical method. The computational results demonstrate that the NAC's dependence on photon energy can be utilized for optically detecting the electric subbands in an SPPSISQW. Furthermore, the obtained results are consistent with prior theoretical and experimental findings.

Presenter: Nguyen Quang Bau