Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/4991
Title: Linear intersubband optical absorption in the semiparabolic quantum wells based on AlN/AlGaN/AlN under a uniform electric field
Authors: Nguyễn, Thành Tiên
Phạm, Thị Bích Thảo
Nguyen, Tieu Tin
Nguyen, Nhut Tuan Hung
Keywords: Linear optical absorption
Linear optical absorption Intersubband transition
Confining potential profile
Interface polarization charge
Issue Date: 2017
Series/Report no.: Physica B;519 .- p.63-68
Abstract: The linear intersubband optical absorption in the polarization semiparabolic quantum wells (SPQWs) are investigated for typical AlN/AlₓGa ₁­­­­­ ­_ ₓ N/AlN. First, the one-dimensional Poisson and Schrödinger equations have been solved by the variational method within a finite potential barrier model and a bent band figured by all confinement sources (realistic model). Then, the intersubband optical absorption between the lowest two subbands has been theoretically studied under an uniform external electric field. Computed results including the effective confining potential profile, the wave function and the distribution of electron gas in quantum wells, intersubband optical absorption coefficient have been discussed. Our calculation shows that the positive interface polarization charges affect on the distribution of the two-dimensional electron gas (2DEG) in SPQWs so it has great influences on the total optical absorption coefficients significantly.
URI: http://localhost:8080//jspui/handle/123456789/4991
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