Excitonic gain and laser emission in ZnSe-based quantum wells

J. Ding, H. Jeon, T. Ishihara, M. Hagerott, A. V. Nurmikko, H. Luo, N. Samarth, J. Furdyna

Research output: Contribution to journalArticlepeer-review

241 Scopus citations

Abstract

We show spectroscopically that the origin of optical gain and laser emission in (Zn,Cd)Se/ZnSe quantum wells at blue-green wavelengths is of excitonic nature. This circumstance derives from the large enhancement in the exciton binding and its oscillator strength which occurs in the quasi-2D case, so that an exciton gas is stable against ionization by optical phonons up to room temperature and that gain in the context of partial phase-space filling can develop at pair densities below the onset to an electron-hole plasma.

Original languageEnglish (US)
Pages (from-to)1707-1710
Number of pages4
JournalPhysical review letters
Volume69
Issue number11
DOIs
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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