Coupling semiconductor nanocrystals to high-Q silica microspheres: cavity QED of quantum dots

Author

Wang, H. ; Palinginis, P. ; Fan, X. ; Lacey, S. ; Lonergan, M.

Author_Institution

Dept. of Phys., Oregon Univ., Eugene, OR, USA

fYear

2000

fDate

12-12 May 2000

Firstpage

99

Abstract

Summary form only given. We have developed a novel QD microcavity by coupling core/shell semiconductor nanocrystals resonantly to whispering gallery modes (WGMs) of a silica microsphere. We have shown that this composite microcavity system features a photon lifetime of order 0.1 Js, corresponding to Q-factors of order 10/sup 8/, four to five orders of magnitude greater than that of other semiconductor microcavities. The extremely high-Q factors along with the very small mode volume allow us to achieve for the first time to our knowledge the good cavity limit of cavity QED of QDs, thus providing a model system for investigating effects of quantum transitions and decoherence in single QDs.

Keywords

micromechanical resonators; nanostructured materials; optical resonators; quantum electrodynamics; quantum optics; semiconductor quantum dots; silicon compounds; Q-factors; QD microcavity; SiO/sub 2/; cavity QED; composite microcavity system; decoherence; extremely high-Q factors; good cavity limit; high-Q silica microspheres; photon lifetime; quantum dots; quantum transitions; semiconductor nanocrystals; single QDs; small mode volume; whispering gallery modes; Nanocrystals; Quantum dots; Silicon compounds; US Department of Transportation;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics and Laser Science Conference, 2000. (QELS 2000). Technical Digest

Conference_Location

San Francisco, CA, USA

ISSN

1094-5695

Print_ISBN

1-55752-608-7

Type

conf

Filename

901702