Physics of the Solid State

, Volume 49, Issue 2, pp 366–370

Nonlinear absorption and refraction of light in a colloidal solution of CdSe/ZnS quantum dots upon two-photon resonant excitation

  • V. S. Dneprovskiĭ
  • E. A. Zhukov
  • D. A. Kabanin
  • V. L. Lyaskovskiĭ
  • A. V. Rakova
  • T. Wumaier
Low-Dimensional Systems and Surface Physics

DOI: 10.1134/S1063783407020308

Cite this article as:
Dneprovskiĭ, V.S., Zhukov, E.A., Kabanin, D.A. et al. Phys. Solid State (2007) 49: 366. doi:10.1134/S1063783407020308

Abstract

This paper reports on the results of an investigation into the nonlinear transmission of individual ultrashort pulses of a train generated by a mode-locked laser through a colloidal solution of CdSe/ZnS quantum dots in toluene upon two-photon resonant excitation of the fundamental optical transition. The specific features of the nonlinear transmission are explained in terms of the two-photon absorption and self-defocusing processes. Analysis of the experimental results makes it possible to separate the self-defocusing processes that are governed by the inertialess change in the refractive index due to the interaction of high-power optical pulses with bound electrons and those determined by the nonlinear change in the refractive index under the action of two-photon-excited carriers in a quantum dot.

PACS numbers

73.21.La42.65.-k

Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • V. S. Dneprovskiĭ
    • 1
  • E. A. Zhukov
    • 1
  • D. A. Kabanin
    • 1
  • V. L. Lyaskovskiĭ
    • 1
  • A. V. Rakova
    • 1
  • T. Wumaier
    • 1
  1. 1.Moscow State UniversityLeninskie gory, MoscowRussia