Terahertz optical gain based on intersubband transitions in optically pumped semiconductor quantum wells: Coherent pump-probe interactions

Ansheng Liu, C. Z. Ning

Research output: Contribution to journalArticle

35 Scopus citations


Optically pumped semiconductor quantum wells (QW) are investigated based on terahertz optical gain due to intersubband transitions. The pump-field-induced nonequilibrium distribution function is computed from a set of rate equations, including both intrasubband and intersubband relaxation processes, for each subband of the QW system. Terahertz optical gain is computed in a unified manner from pump-light-induced population inversion and stimulated Raman processes. This terahertz gain is significantly affected by the coherent pump and signal wave interactions.

Original languageEnglish (US)
Pages (from-to)1207-1209
Number of pages3
JournalApplied Physics Letters
Issue number9
StatePublished - Aug 30 1999
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this