Program

P.59 -- Poster, NCTP-42

Date: Wednesday, 2 August 2017

Time: 08h30 - 10h00

Polar charges effect on multisubband electron mobility and linear intersubband optical absorption in the semiparabolic quantum wells based on AlN/AlGaN/AlN

Nguyen Thanh Tien (1), Nguyen Nhut Tuan Hung (1), Tieu Tin Nguyen (1), Pham Thi Bich Thao (1, 2)

(1) Can Tho University (2) Graduate University of Science and Technology, Vietnam Academy of Science and Technology

This work presents multisubband electron mobility and linear intersubband optical absorption in the polarization semiparabolic quantum wells (SPQWs) AlN/AlxGa1−xN/AlN. First, a theory of multisubband mobility and the intersubband optical absorption between the lowest two subbands under a uniform external electric field is studied. By using the variation method, the one-dimensional Poisson and Schrodinger equations have been solved within a finite potential barrier model and a bent band figured by all confinement sources (realistic model). Then, we computed and discussed about the effective confining potential profile, the wave function and the distribution of electron gas in quantum wells, multisubband mobility and intersubband optical absorption coefficient. Our result shows that the positive interface polarization charges effect on the distribution of the two-dimensional electron gas (2DEG) in SPQWs so it has great influences on multisubband mobility and the total optical absorption coefficients.

Presenter: Pham Thi Bich Thao