Tyndall scattering in colloidal solution of quantum dots under the action of laser pulses

A. M. Smirnov; A. D. Golinskaya; K. V. Ezhova; V. S. Dneprovskii

doi:10.1117/12.2306729

14 May 2018 Tyndall scattering in colloidal solution of quantum dots under the action of laser pulses

A. M. Smirnov, A. D. Golinskaya, K. V. Ezhova, V. S. Dneprovskii

Author Affiliations +

Proceedings Volume 10684, Nonlinear Optics and its Applications 2018; 106841U (2018) https://doi.org/10.1117/12.2306729
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

The high-intensity nanosecond laser pulses scattering in strongly absorbing colloidal solutions of СdSe/ZnS quantum dots has been investigated. Different types of nonlinear Tyndall scattering mechanism was revealed as a function of excitation radiation intensity. At the low laser pulses intensity (up to 15 MW/cm² ) saturation of the basic exciton transition in strongly absorbing colloidal solution of СdSe/ZnS quantum dots was observed. In this case of average laser pulses intensity (15-200 MW/cm² ) the dominant scattering mechanism is scattering on dipoles induced by the electric field and scattering on density fluctuations of the dispersed medium around bleached quantum dots. At the higher intensity (200-4000 MW/cm² ), the predominant scattering mechanism is the scattering on bubbles of gas formed around local heating centers – colloidal quantum dots.

Citation Download Citation

A. M. Smirnov, A. D. Golinskaya, K. V. Ezhova, and V. S. Dneprovskii "Tyndall scattering in colloidal solution of quantum dots under the action of laser pulses", Proc. SPIE 10684, Nonlinear Optics and its Applications 2018, 106841U (14 May 2018); https://doi.org/10.1117/12.2306729

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