Nonresonant Transient Refractive Index Spectroscopy in Semiconductor Quantum Dots

D.K. Zharkov; A.V. Leontyev; A.G. Shmelev; V.G. Nikiforov; V.S. Lobkov

doi:10.1051/epjconf/201510307006

EPJ

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Proceedings

Open Access

EPJ Web of Conferences 103, 07006 (2015)
https://doi.org/10.1051/epjconf/201510307006

Nonresonant Transient Refractive Index Spectroscopy in Semiconductor Quantum Dots

D.K. Zharkov^a, A.V. Leontyev, A.G. Shmelev, V.G. Nikiforov and V.S. Lobkov

Kazan E. K. Zavoisky Physical -Technical Institute, Sibirsky tract, 10/7 420029 Kazan, Russia

^a Corresponding author: dzharkov@list.ru

Published online: 25 September 2015

Abstract

We report transient refractive index change in semiconductor nanoparticles dispersed in polymethylmethacrylate matrix via pump-probe experiment. At lower pump intensities the detected signal consists of the pulse autocorrelation-shaped part and another part delayed by 300 fs. The latter’s relative intensity depends on the pump level. However in CdS monocrystal the detected signal was found to lack this second feature completely.

Key words: quantum dots / semiconductor nanoparticles / transient lens / nonlinear refractive index

© Owned by the authors, published by EDP Sciences, 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.