Intersubband electroluminescence in InAs quantum wells embedded in InAs/GaSb/AlSb type-II cascade structures is reported. The observed emission energy is in good agreement with calculation based on the multiband k · p theory. Dominant polarization of the emitted light is perpendicular to the quantum well layers. Difference in the spectrum shape between intersubband and interband cascade transitions is also presented.
|Number of pages||3|
|Journal||Applied Physics Letters|
|Publication status||Published - 1999 Mar 8|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)