8 May 2013 Self-diffraction of laser beams in the case of resonant excitation of excitons in colloidal CdSe/ZnS quantum dots
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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.
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V. Dneprovskii, V. Dneprovskii, A. Smirnov, A. Smirnov, M. Kozlova, 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); doi: 10.1117/12.2017347; https://doi.org/10.1117/12.2017347
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