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From amplified spontaneous emission to microring lasing using nanocrystal quantum dot solids

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7 Author(s)
Malko, A.V. ; Chemistry Division, C-PCS, MS-J585, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 ; Mikhailovsky, A.A. ; Petruska, M.A. ; Hollingsworth, J.A.
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We study different emission regimes in close-packed films of chemically synthesized CdSe nanoparticles [nanocrystal quantum dots (NQDs)]. We observe that the NQD photoluminescence is dominated by excitons and biexcitons, respectively, before and after the threshold for stimulated emission. Furthermore, we demonstrate the regime of microring lasing into sharp, whispering-gallery modes using NQD solids incorporated into microcapillary tubes. This result indicates a feasibility of miniature, solid-state laser devices based on chemically synthesized NQDs. © 2002 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:81 ,  Issue: 7 )

Date of Publication:

Aug 2002

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