Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots

Victor I Klimov, D. McBranch, C. Schwarz, C. W. White

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Femtosecond studies of energy relaxation and trapping dynamics were performed in three types of quantum-dot systems: semiconductor nanocrystal (NC)/glass composites; ion-implanted NCs; and colloidal NCs. High-sensitivity fs chirp-free transient absorption was applied to directly measure the population/depopulation dynamics of the lowest and the first excited electron states in CdSe NCs of different radii, with 1s-1p energy separation up to 16 longitudinal optical-phonon energies. A fast subps 1p-1s relaxation was observed with the rate enhanced in NCs of smaller radius, indicating the opening of new confinement-enhanced relaxation channels which dominate any phonon-bottleneck effects.

Original languageEnglish
Title of host publicationTechnical Digest - European Quantum Electronics Conference
Editors Anon
PublisherIEEE
Pages165
Number of pages1
Publication statusPublished - 1998
EventProceedings of the 1998 International Quantum Electronics Conference - San Francisco, CA, USA
Duration: May 3 1998May 8 1998

Other

OtherProceedings of the 1998 International Quantum Electronics Conference
CitySan Francisco, CA, USA
Period5/3/985/8/98

Fingerprint

trapping
quantum dots
radii
electron states
chirp
energy
nanocrystals
composite materials
glass
sensitivity
ions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Klimov, V. I., McBranch, D., Schwarz, C., & White, C. W. (1998). Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots. In Anon (Ed.), Technical Digest - European Quantum Electronics Conference (pp. 165). IEEE.

Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots. / Klimov, Victor I; McBranch, D.; Schwarz, C.; White, C. W.

Technical Digest - European Quantum Electronics Conference. ed. / Anon. IEEE, 1998. p. 165.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Klimov, VI, McBranch, D, Schwarz, C & White, CW 1998, Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots. in Anon (ed.), Technical Digest - European Quantum Electronics Conference. IEEE, pp. 165, Proceedings of the 1998 International Quantum Electronics Conference, San Francisco, CA, USA, 5/3/98.
Klimov VI, McBranch D, Schwarz C, White CW. Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots. In Anon, editor, Technical Digest - European Quantum Electronics Conference. IEEE. 1998. p. 165
Klimov, Victor I ; McBranch, D. ; Schwarz, C. ; White, C. W. / Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots. Technical Digest - European Quantum Electronics Conference. editor / Anon. IEEE, 1998. pp. 165
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