Optik, volume 272, pages 170276
Size dependence of nonlinear optical properties of PbS QDs, passivated with thioglycolic acid
Publication type: Journal Article
Publication date: 2023-02-01
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering
Abstract
The size dependence of the nonlinear optical response of hydrophilic colloidal PbS quantum dots, passivated with thioglycolic acid (PbS/TGA QDs) with an average size of 3.0, 3.5, 4.5 nm in the field of 10 ns laser pulses at 532 nm has been analyzed. It is shown that the key mechanism of nonlinear absorption is the reverse saturable absorption, which occurs with involvement of QDs defect trap states. The formation of SiO 2 monolayer on the PbS/TGA QDs surface, using MPTMS makes it possible to significantly increase in the luminescence intensity from 4 to 4.5 times. In this case, the nonlinear absorption coefficient and nonlinear refraction index do not change. The facts indicate the implementation of a nonlinear optical response in the nanosecond probe pulse range on trap states that are not luminescence centers.
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Zvyagin A. I. et al. Size dependence of nonlinear optical properties of PbS QDs, passivated with thioglycolic acid // Optik. 2023. Vol. 272. p. 170276.
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Zvyagin A. I., Perepelitsa A. S., Chirkov K. S., Smirnov M. S., Ovchinnikov O. Size dependence of nonlinear optical properties of PbS QDs, passivated with thioglycolic acid // Optik. 2023. Vol. 272. p. 170276.
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TY - JOUR
DO - 10.1016/j.ijleo.2022.170276
UR - https://doi.org/10.1016/j.ijleo.2022.170276
TI - Size dependence of nonlinear optical properties of PbS QDs, passivated with thioglycolic acid
T2 - Optik
AU - Zvyagin, Andrey I.
AU - Perepelitsa, Aleksey S.
AU - Chirkov, K S
AU - Smirnov, M S
AU - Ovchinnikov, O.V.
PY - 2023
DA - 2023/02/01 00:00:00
PB - Elsevier
SP - 170276
VL - 272
SN - 0030-4026
SN - 1618-1336
ER -
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@article{2023_Zvyagin,
author = {Andrey I. Zvyagin and Aleksey S. Perepelitsa and K S Chirkov and M S Smirnov and O.V. Ovchinnikov},
title = {Size dependence of nonlinear optical properties of PbS QDs, passivated with thioglycolic acid},
journal = {Optik},
year = {2023},
volume = {272},
publisher = {Elsevier},
month = {feb},
url = {https://doi.org/10.1016/j.ijleo.2022.170276},
pages = {170276},
doi = {10.1016/j.ijleo.2022.170276}
}
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