Self-diffraction of laser beams in the case of resonant excitation of excitons in colloidal CdSe/ZnS quantum dots

V. Dneprovskii; A. Smirnov; M. Kozlova

doi:10.1117/12.2017347

8 May 2013 Self-diffraction of laser beams in the case of resonant excitation of excitons in colloidal CdSe/ZnS quantum dots

V. Dneprovskii, A. Smirnov, M. Kozlova

Author Affiliations +

Proceedings Volume 8772, Nonlinear Optics and Applications VII; 877209 (2013) https://doi.org/10.1117/12.2017347
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

Abstract

Self-diffraction of two types has been discovered in the case of resonant excitation of excitons in CdSe/ZnS quantum dots (highly absorbing colloidal solution) by powerful beams of mode-locked laser with picosecond pulse duration. I. The bleaching of exciton transition provokes the creation of transparency channel and laser beam’s self-diffraction at the induced circular aperture. II. Self-diffraction arises for two laser beams intersecting in the cell with colloidal CdSe/ZnS quantum dots due to the induced transient diffraction grating. Nonlinear optical properties responsible for the observed self-action effects in CdSe/ZnS quantum dots are discussed and a method for estimating laser pulse duration is suggested.

Citation Download Citation

V. Dneprovskii, A. Smirnov, and M. Kozlova "Self-diffraction of laser beams in the case of resonant excitation of excitons in colloidal CdSe/ZnS quantum dots", Proc. SPIE 8772, Nonlinear Optics and Applications VII, 877209 (8 May 2013); https://doi.org/10.1117/12.2017347

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