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Linear and nonlinear intersub-band optical absorption in diffusion-induced AlGaAs/GaAs quantum well at far IR wavelengths

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3 Author(s)
Li, E.H. ; Dept. of Electron. & Electr. Eng., Surrey Univ., Guildford, UK ; Weiss, B.L. ; Laszcz, A.

The effect of interdiffusion on the intersub-band absorption coefficient of AlGaAs/GaAs single quantum well structures has been analysed, based on the linear and nonlinear contributions from the first and third order susceptibilities, respectively. The results show that interdiffusion may be used to tune the intersub-band absorption over a large wavelength range of tens of micrometres together with a uniform absorption coefficient.

Published in:

Electronics Letters  (Volume:28 ,  Issue: 9 )