Program

P.75 -- Poster, NCTP-41

Date: Wednesday, 3 August 2016

Time: 08h30 - 10h00

Influence of phonon confinement on the optically detected magneto-phonon resonance line-width in quantum wells

Nguyen Dinh Hien (1), Le Dinh (1), Huynh Vinh Phuc (2), Tran Cong Phong (3)

(1) Hue University’s College of Education, 34 Le Loi, Hue; (2) Dong Thap University, 783 Phạm Huu Lau, Cao Lanh, Dong Thap; (3) Viet Nam Institute of Educational Sciences, 101 Tran Hung Dao, Hoan Kiem, Ha Noi.

We investigate the influence of phonon confinement on the optically-detected magneto-phonon resonance (ODMPR) effect and ODMPR line-width in parabolic quantum wells. The ODMPR conditions as functions of the well's parameters and the photon energy are also obtained. The shifts of ODMPR peaks caused by the confined phonon are discussed. The numerical result for a specific quantum well shows that in the two cases of confined and bulk phonons, the line-width (LW) is sensitive for changing of the confinement frequency, doped concentration, and temperature. Furthermore, in the large range of the confinement frequency, the influence of phonon confinement plays an important role and cannot be neglected in reaching the ODMPR line- width.

Presenter: Nguyen Dinh Hien