Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots

V. Klimov, D. McBranch, C. Schwarz, C. W. White

Research output: Contribution to conferencePaper

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
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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Klimov, V., McBranch, D., Schwarz, C., & White, C. W. (1998). Ultrafast energy relaxation and trapping dynamics in semiconductor quantum dots. 165. Paper presented at Proceedings of the 1998 International Quantum Electronics Conference, San Francisco, CA, USA, .