Multiexcitonic two-state lasing in a CdSe nanocrystal laser
- 27 September 2004
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 85 (13) , 2460-2462
- https://doi.org/10.1063/1.1795368
Abstract
We report simultaneous amplified spontaneous emission from two different multiexcitonic transitions −1Se–1S3∕2 and 1Pe–1P3∕2− of colloidal CdSe nanocrystals (NCs) stabilized in high volume fraction in titania matrices. Two-state lasing from both multiexcitonic transitions is achieved in a surface-emitting distributed feedback CdSe NC laser. Variable stripe length measurements show that the gain from the 1Pe–1P3∕2 transition is approximately twice that of the −1Se–1S3∕2 transition for 4.2nm radius CdSe∕ZnS core-shell NCs.Keywords
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