Naval Postgraduate School
Proposed Use of Step Quantum Wells for Terahertz Quantum Cascade Lasers
Karunasiri_W_Freeman_Proposed_Use_of_Step_Lete_news_poster.pdf (167.1Kb)Date
2007Metadata
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Terahertz (THz) quantum cascade lasers (QCLs) have been designed by a number of
approaches and variations using square quantum wells. In this paper, a step quantum well
structure is analyzed for use in LO-phonon assisted QCLs where the radiative transition and
LO-phonon transition are within the same well. The electron-phonon and electron-electron
scattering rates are calculated for this step well and a QCL structure for operating in the THz
frequencies is proposed.
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