Coherent Exciton Lasing in ZnSe/ZnCdSe Quantum Wells?
M.E. Flatte', E. Runge, H. Ehrenreich
TL;DR
This paper proposes a new mechanism for exciton lasing in ZnSe/ZnCdSe quantum wells, suggesting it involves a BCS-like condensed exciton state, with calculations indicating a gain region below the exciton line and experimental verification via differential spectroscopy.
Contribution
It introduces a novel exciton lasing mechanism involving a coherent exciton state in quantum wells, supported by theoretical calculations.
Findings
Gain region lies below the exciton line
Transparency region separates gain and absorption regimes
Lasing mechanism linked to a BCS-like exciton condensate
Abstract
A new mechanism for exciton lasing in ZnSe/ZnCdSe quantum wells is proposed. Lasing, occurring below the lowest exciton line, may be associated with a BCS-like condensed (coherent) exciton state. This state is most stable at low temperatures for densities in the transition region separating the exciton Bose gas and the coherent exciton state. Calculations show the gain region to lie below the exciton line and to be separated from the absorption regime by a transparency region of width, for example, about 80 meV for a 90 Angstrom ZnSe/Zn_(0.75)Cd_(0.25)Se quantum well. Experimental observation of the transparency region using differential spectroscopy would confirm this picture.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.