Intersubband transitions in Al_0.82In_0.18N/GaN single quantum well
摘要
The influence of the width of a lattice-matched Al 0.82 In 0.18 N/GaN single quantum well (SQW) on the absorption coefficients and wavelength of the intersubband transition (ISBT) has been investigated by solving the Schrdinger and Poisson equations self-consistently.The wavelength of 1-2 ISBT increases with L,the thickness of the single quantum well,ranging from 2.88 μm to 3.59 μm.The absorption coefficients of 1-2 ISBT increase with L at first and then decrease with L,with a maximum when L is equal to 2.6 nm.The wavelength of 1-3 ISBT decreases with L at first and then increases with L,with a minimum when L is equal to 4 nm,ranging from approximately 2.03 μm to near 2.11 μm.The absorption coefficients of 1-3 ISBT decrease with L.The results indicate that mid-infrared can be realized by the Al 0.82 In 0.18 N/GaN SQW.In addition,the wavelength and absorption coefficients of ISBT can be adjusted by changing the width of the SQW.