Inhomogeneous origin of the interface roughness broadening of intersubband transitions

Khurgin, Jacob B.
September 2008
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p091104
Academic Journal
The impact of the interface roughness on intersubband transitions (ISTs) in quantum wells is analyzed as an inhomogeneous broadening due to localization rather than a traditional scattering process. The results offer simple explanation for the temperature dependent spectra of gain and absorption in quantum cascade lasers and also for the strong IST polariton phenomena.


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