Intersubband plasmon emission induced by current injection was studied. A strong increase of the intensity was found for lower resonance frequencies, when LO phonon emission is weak. These effects are explained by the interplay of LO phonon scattering with a resonant intersubband plasmon resonance. From these results the intersubband plasmon decay time is estimated to be τ≈2.5 ps.

Topics
Terahertz radiation, Phonon scattering, Intersubband plasmons
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© 2011 American Institute of Physics.
2011
American Institute of Physics
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