Optical nonlinearities and ultrafast carrier dynamics in semiconductor quantum dots

Victor I Klimov, D. McBranch, C. Schwarz

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

Abstract

The femtosecond (fs) studies of ultrafast optical nonlinearities, energy relaxation and trapping dynamics in three types of quantum dots are reported. High sensitivity fs nonlinear transmission experiments in the new chirp-free configuration were applied to measure pump-induced absorption changes for optical transitions involving the lowest and the first excited electron states in CdSe nanocrystallines of different radii. The Coulomb interaction influences all transitions, resulting in transition shifts which are seen as derivative-like features in transient absorption (TA). The pump intensity-dependent TA indicate a change in carrier relaxation channels at high pump levels, manifested as a distinct difference in the nonlinear optical response.

Original languageEnglish
Title of host publicationIEEE Nonlinear Optics: Materials, Fundamentals and Applications - Conference Proceedings
PublisherIEEE
Pages136-138
Number of pages3
Publication statusPublished - 1998
EventProceedings of the 1998 IEEE Nonlinear Optics Topical Meeting - Princeville, HI, USA
Duration: Aug 10 1998Aug 14 1998

Other

OtherProceedings of the 1998 IEEE Nonlinear Optics Topical Meeting
CityPrinceville, HI, USA
Period8/10/988/14/98

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Klimov, V. I., McBranch, D., & Schwarz, C. (1998). Optical nonlinearities and ultrafast carrier dynamics in semiconductor quantum dots. In IEEE Nonlinear Optics: Materials, Fundamentals and Applications - Conference Proceedings (pp. 136-138). IEEE.