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Spontaneous emission enhancement and saturable absorption of colloidal quantum dots coupled to photonic crystal cavity

TitleSpontaneous emission enhancement and saturable absorption of colloidal quantum dots coupled to photonic crystal cavity
Publication TypeJournal Article
Year of Publication2013
AuthorsS. Gupta, and E. Waks
JournalOptics Express
Volume21
Issue24
Pagination029612
Date Published12/2/2013
Accession NumberWOS:000327947500054
KeywordsAll-optical switch, Bistability, Fluorescence, Microcavity, Nanobeam Cavities, Nanocavities, Nanocrystals, Optomechanical Cavity, Semiconductors
Abstract

We demonstrate spontaneous emission rate enhancement and saturable absorption of cadmium selenide colloidal quantum dots coupled to a nanobeam photonic crystal cavity. We perform time-resolved lifetime measurements and observe an average enhancement of 4.6 for the spontaneous emission rate of quantum dots located at the cavity as compared to those located on an unpatterned surface. We also demonstrate that the cavity linewidth narrows with increasing pump intensity due to quantum dot saturable absorption. 

URLhttp://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-24-29612
DOI10.1364/OE.21.029612