Nonlinear light absorption in colloidal CdSe/CdS nanoplatelets

V. N. Mantsevich; D. S. Smirnov; A. M. Smirnov; A. D. Golinskaya; M. V. Kozlova; B. M. Saidjonov; V. S. Dneprovskii; R. B. Vasiliev

Nonlinear light absorption in colloidal CdSe/CdS nanoplatelets

Mesoscale and Nanoscale Physics 2018-07-03 v1

Authors: V. N. Mantsevich , D. S. Smirnov , A. M. Smirnov , A. D. Golinskaya , M. V. Kozlova , B. M. Saidjonov , V. S. Dneprovskii , R. B. Vasiliev

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Abstract

We investigated the nonlinear optical properties of CdSe/CdS nanoplatelets in the vicinity of heavy hole and light hole exciton resonances. The two color pump-probe technique was applied. The first intense pulse created non-equilibrium exciton population, which was detected as a decrease of probe light absorption. We observed intense scattering of excitons between heavy- and light-hole excitonic states. We also studied experimentally saturation of absorption in nanoplatelets. Theoretical description of these phenomena allowed us to determine parameters of exciton dynamics in nanoplatelets.

Keywords

optical absorption spectroscopy excitons in semiconductors optical pumping

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@article{arxiv.1807.00697,
  title  = {Nonlinear light absorption in colloidal CdSe/CdS nanoplatelets},
  author = {V. N. Mantsevich and D. S. Smirnov and A. M. Smirnov and A. D. Golinskaya and M. V. Kozlova and B. M. Saidjonov and V. S. Dneprovskii and R. B. Vasiliev},
  journal= {arXiv preprint arXiv:1807.00697},
  year   = {2018}
}

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6 pages, 7 figures

Nonlinear light absorption in colloidal CdSe/CdS nanoplatelets

Abstract

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