Role of excited states for the material gain and threshold current density in quantum wire intersubband laser structures

DOI to cite this document:: 10.5283/epub.1793

Herrle, Thomas ; Haneder, Stephan ; Wegscheider, Werner

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Date of publication of this fulltext: 05 Aug 2009 13:32

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Abstract

We calculated the material gain and the threshold current density for quantum wire intersubband laser structures. In quantum cascade laser devices with active regions of lower dimensionality a reduction of the non-radiative losses and consequently an increase in the material gain and a reduction of the threshold current density is predicted. In our calculations of the material gain and the ...