Oscillator strength of gaussian double quantum well for intersubband transition

Abstract

Oscillator strength and absorption cross-section of Double quantum well triple barrier structure with Gaussian geometry is analytically computed for intersubband optical transition between ground state and first excited state. Electric field is applied along quantum confinement, and Kane-type conduction band nonparabolicity of first order is considered for near accurate computation. Result suggests that oscillator strength monotonically increases with wavelength, and is higher when nonparabolicity factor is considered. Cross-section is higher for lower well dimension. Result is also compared with parabolic overestimation. Simulated findings are important for designing optical detector.