Nonlinear Refraction in Colloidal Ag2S Quantum Dots.

Authors :: Kondratenko, T. S.
Smirnov, M. S.
Ovchinnikov, O. V.
Zvyagin, A. I.
Chevychelova, T. A.
Taydakov, I. V.
Source :: Bulletin of the Lebedev Physics Institute; Jun2019, Vol. 46 Issue 6, p210-214, 5p
Publication Year :: 2019
Abstract: Features of nonlinear refraction formation in colloidal solutions containing Ag<subscript>2</subscript>S quantum dots passivated with thioglycolic acid (Ag<subscript>2</subscript>S/TGA QDs) with a concentration of 0.1% and an average size of 2.0 nm are considered. Nonthermal self-focusing caused by the "band filling" effect under exciton excitation was detected by the Z-scanning method for 10-ns pulses of a YAG:Nd laser at a wavelength of 532 nm for Ag<subscript>2</subscript>S/TGA QDs having an exciton absorption maximum at 590 nm. [ABSTRACT FROM AUTHOR]