Localized exciton and its stimulated emission in surface mode from single-layer
Open Access
- 15 January 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 57 (4) , R2041-R2044
- https://doi.org/10.1103/physrevb.57.r2041
Abstract
Exciton localization in was studied. At 2 K, the time-integrated photoluminescence (PL) spectrum showed a Stokes shift from the absorption shoulder and broadening at the lower photon energy side. Site-selectively excited PL measurements determined the mobility edge. The exciton relaxation processes were studied by use of time-resolved PL spectroscopy. The PL decay time increased with the decrease of the detection-photon energy, indicating the dynamical features of exciton localization. In addition, we observed localized exciton luminescence turned into stimulated emission just below the mobility edge.
Keywords
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