Document Detail

Bistable optical response of a nanoparticle heterodimer: Mechanism, phase diagram, and switching time.
MedLine Citation:
PMID:  23822299     Owner:  NLM     Status:  In-Data-Review    
We conduct a theoretical study of the bistable optical response of a nanoparticle heterodimer comprised of a closely spaced semiconductor quantum dot and a metal nanoparticle. The bistable nature of the response results from the interplay between the quantum dot's optical nonlinearity and its self-action (feedback) originating from the presence of the metal nanoparticle. The feedback is governed by a complex valued coupling parameter G = GR + iGI. We calculate the bistability phase diagram within the system's parameter space: spanned by GR, GI, and Δ, the latter being the detuning between the driving frequency and the transition frequency of the quantum dot. Additionally, switching times from the lower stable branch to the upper one (and vice versa) are calculated as a function of the intensity of the driving field. The conditions for bistability to occur can be realized, for example, for a heterodimer comprised of a closely spaced CdSe (or CdSe/ZnSe) quantum dot and a gold nanosphere.
Bintoro S Nugroho; Alexander A Iskandar; Victor A Malyshev; Jasper Knoester
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of chemical physics     Volume:  139     ISSN:  1089-7690     ISO Abbreviation:  J Chem Phys     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-07-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375360     Medline TA:  J Chem Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  014303     Citation Subset:  IM    
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
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