Journal of Russian Laser Research, volume 41, issue 6, pages 670-680
Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots
A. I. Zvyagin
1
,
T. A. Chevychelova
1
,
I. G. Grevtseva
1
,
M. S. Smirnov
1
,
A S Selyukov
2, 3, 4
,
O. V. Ovchinnikov
1
,
R. A. Ganeev
1
Publication type: Journal Article
Publication date: 2020-11-02
Journal:
Journal of Russian Laser Research
Quartile SCImago
Q3
Quartile WOS
Q4
Impact factor: 0.9
ISSN: 10712836, 15738760
Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Abstract
We analyze the features of nonlinear refraction in colloidal solutions containing Ag2S quantum dots capped with thioglycolic acid (Ag2S/TGA) or L-cysteine (Ag2S/L-Cys), with the quantum-dot (QD) sizes ranging from 1.7 to 5.5 nm and their concentration in the solution being 0.1%. The Z-scans of the samples were obtained using 10 ns pulses of 532 nm radiation. For samples with various average sizes and positions of the characteristic feature in the optical density spectrum, both self-focusing and self-defocusing of radiation were observed. The contribution of thermal refraction to the recorded Z-scans was estimated, and the impact of thermal effects on the observed nonlinear refraction was shown to be negligible. The solutions of the Ag2S/TGA QDs with the ground state exciton absorption peaked at 590 nm exhibit self-focusing. The samples with recombination luminescence and the ground state exciton absorption peaked at 750 nm reveal self-defocusing. We show that nonlinear refraction in the case of nanosecond pulses is predominantly nonthermal in nature and is due to absorption by free charge carriers, as well as due to the band filling effect in the Ag2S QDs, which involves localized states of impurities.
Top-30
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Citations by publishers
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2 publications, 16.67%
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1 publication, 8.33%
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1 publication, 8.33%
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1 publication, 8.33%
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- We do not take into account publications without a DOI.
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- Statistics recalculated weekly.
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Zvyagin A. I. et al. Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots // Journal of Russian Laser Research. 2020. Vol. 41. No. 6. pp. 670-680.
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Zvyagin A. I., Chevychelova T. A., Grevtseva I. G., Smirnov M. S., Selyukov A. S., Ovchinnikov O. V., Ganeev R. A. Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots // Journal of Russian Laser Research. 2020. Vol. 41. No. 6. pp. 670-680.
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TY - JOUR
DO - 10.1007/s10946-020-09923-4
UR - https://doi.org/10.1007/s10946-020-09923-4
TI - Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots
T2 - Journal of Russian Laser Research
AU - Zvyagin, A. I.
AU - Chevychelova, T. A.
AU - Grevtseva, I. G.
AU - Smirnov, M. S.
AU - Selyukov, A S
AU - Ovchinnikov, O. V.
AU - Ganeev, R. A.
PY - 2020
DA - 2020/11/02 00:00:00
PB - Springer Nature
SP - 670-680
IS - 6
VL - 41
SN - 1071-2836
SN - 1573-8760
ER -
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@article{2020_Zvyagin,
author = {A. I. Zvyagin and T. A. Chevychelova and I. G. Grevtseva and M. S. Smirnov and A S Selyukov and O. V. Ovchinnikov and R. A. Ganeev},
title = {Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots},
journal = {Journal of Russian Laser Research},
year = {2020},
volume = {41},
publisher = {Springer Nature},
month = {nov},
url = {https://doi.org/10.1007/s10946-020-09923-4},
number = {6},
pages = {670--680},
doi = {10.1007/s10946-020-09923-4}
}
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Zvyagin, A. I., et al. “Nonlinear Refraction in Colloidal Silver Sulfide Quantum Dots.” Journal of Russian Laser Research, vol. 41, no. 6, Nov. 2020, pp. 670-680. https://doi.org/10.1007/s10946-020-09923-4.