Program

P.69 -- Poster, NCTP-42

Date: Wednesday, 2 August 2017

Time: 08h30 - 10h00

Linear and nonlinear optically detected electrophonon resonance in triangular quantum wells

Le Dinh (1), Luong Van Tung, Huynh Vinh Phuc (2), Pham Tuan Vinh (1,2)

(1) Department of Physics, Center for Theoretical and Computational Physics, Hue University’s College of Education, Hue City; (2) Division of Theoretical Physics, Dong Thap University, Dong Thap

In this work, we study a detailed theory of linear and nonlinear optical absorption power in triangular quantum well (TrQW) when electrons are scattered with longitudinal optical phonons (LO phonons). The analytic expression for optical absorption power of electromagnetic waves caused by confined electrons is obtained in the case of electron-LO phonon scattering. Nonlinear optically detected electrophonon resonance (ODEPR) effect in a specific GaAs/AlGaAs quantum well with triangular potential is investigated. Conditions for the ODEPR are obtained based on the energy-momentum conservation law. From the curves expressing the dependence of the absorption power on photon energy we obtained the ODEPR-linewidths as profiles of the curves. Computational results show that the nonlinear ODEPR-linewidths increase with temperature and decrease with electric field amplitude.

Presenter: Pham Tuan Vinh