Programme

P.25 -- Poster, VCTP-49

Date: Wednesday, 31 July 2024

Time: 08:30 - 10:00

The three-level optical Stark effect of exciton in GaAs disk-shaped quantum dots

Le Thi Dieu Hien (1), Le Thi Ngoc Bao (1), Duong Dinh Phuoc (2), Dinh Nhu Thao (3)

(1) University of Sciences, Hue University; (2) Hai Ba Trung High School; (3) University of Education, Hue University

In the framework of the effective mass approximation, the three-level optical Stark effect of exciton in the disk-shaped quantum dots is theoretically studied using the renormalized wavefunction method. The characteristics of this effect are investigated through the interband optical transition rate between the two lowest levels of hole and electron in a strong pump laser field. Our numerical results and quantitative analysis not only confirm the existence of the optical Stark effect in the considered structure but also show that both the detuning, confined frequency and the geometrical parameters of the quantum dot have a strong influence on the behaviors of the exciton absorption spectrum.

Presenter: Le Thi Dieu Hien