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Design of intersubband quantum well far infrared lasers

Zhi-Jun Xin and H.N.Rutt

Abstract

A strongly asymmetric stepped and a parallel quantum well (QW) far-infrared laser structure are proposed. The QWs have been carefully tailored so that the subband wavefunction features favour population inversion. The overlap ratios of the pump light and the lasing light with the QW layer can be improved by placing a thin germanium layer on top of the structures. As a result, the predicted threshold pump powers are reduced.


Semiconductor Science and Technology (1997) Vol.12 pp.1129-1134

Publisher′s URL: http://ej.iop.org/links/q03/m5+xTcitX,fjIqbzfCmsQw/s70911.pdf

Southampton ePrint id: 77759

 

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Copyright University of Southampton 2006