Transient Absorption Dynamics and Nonlinear Optical Response in Colloidal Ag2S Quantum Dots

被引：5

作者：

Smirnov, M. S. ^{[1
]}

Ovchinnikov, O., V ^{[1
]}

Zvyagin, A., I ^{[1
]}

Tikhomirov, S. A. ^{[2
]}

Ponyavina, A. N. ^{[2
]}

Povedailo, V. A. ^{[2
]}

Nguyen Thanh Binh ^{[3
]}

Pham Hong Minh ^{[3
]}

机构：

[1] Voronezh State Univ, Voronezh 394018, Russia

[2] Natl Acad Sci Belarus, Stepanov Inst Phys, Minsk 220072, BELARUS

[3] Vietnam Acad Sci & Technol, Inst Phys, Hanoi, Vietnam

来源：

OPTICS AND SPECTROSCOPY | 2022年 / 130卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

Ag2S quantum dots; nonlinear refraction; nonlinear absorption; Z-scan; transient absorption; LUMINESCENCE; NONSTOICHIOMETRY; NANOCOMPOSITES; DEPENDENCE; REFRACTION; SULFIDE;

D O I：

10.1134/S0030400X22030146

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The mechanism of the nonlinear optical response of colloidal solutions of Ag2S quantum dots passivated with thioglycolic acid molecules is considered. Appearance of nonlinear absorption and nonlinear refraction is shown by the Z-scan method using 10-ns pulses of the second harmonic of a Nd:YAG laser. The absorption coefficient dependence was found to saturate with increasing incident radiation intensity. It is suggested that nonlinear absorption occurs with participation of the localized states of structural defects in Ag2S, including the defect luminescence center, which is confirmed by femtosecond transient absorption spectroscopy. A broad structureless transient absorption band is observed in the range of 500-1000 nm, which decays on a time scale of picoseconds. It is concluded that the transient absorption signal is caused by fast (fractions of picoseconds) capture of charge carriers by localized states, which then induce the nonlinear absorption of 10-ns pulses.

引用

页码：224 / 231

页数：8

共 50 条

[21] Nonlinear optical characterization of colloidal solutions containing dye and Ag2S quantum dot associates
Boltaev, G. S.
Sobirov, B.
Reyimbaev, S.
Sherniyozov, H.
Usmanov, T.
Smirnov, M. S.
Ovchinnikov, O. V.
Grevtseva, I. G.
Kondratenko, T. S.
Shihaliev, H. S.
Ganeev, R. A.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2016, 122 (12):
[22] Nonlinear optical characterization of colloidal solutions containing dye and Ag2S quantum dot associates
G. S. Boltaev
B. Sobirov
S. Reyimbaev
H. Sherniyozov
T. Usmanov
M. S. Smirnov
O. V. Ovchinnikov
I. G. Grevtseva
T. S. Kondratenko
H. S. Shihaliev
R. A. Ganeev
Applied Physics A, 2016, 122
[23] ML-Based Forecasting of Temporal Dynamics in Luminescence Spectra of Ag2S Colloidal Quantum Dots
Malashin, Ivan P.
Daibagya, Daniil S.
Tynchenko, Vadim S.
Nelyub, Vladimir A.
Borodulin, Aleksei S.
Gantimurov, Andrei P.
Ambrozevich, Sergey A.
Selyukov, Alexandr S.
IEEE ACCESS, 2024, 12 : 53320 - 53334
[24] Photoinduced Degradation of the Optical Properties of Colloidal Ag2S and CdS Quantum Dots Passivated by Thioglycolic Acid
Smirnov, M. S.
Ovchinnikov, O. V.
Grevtseva, I. G.
Zvyagin, A. I.
Perepelitsa, A. S.
Ganeev, R. A.
OPTICS AND SPECTROSCOPY, 2018, 124 (05) : 681 - 686
[25] Photoinduced Degradation of the Optical Properties of Colloidal Ag2S and CdS Quantum Dots Passivated by Thioglycolic Acid
M. S. Smirnov
O. V. Ovchinnikov
I. G. Grevtseva
A. I. Zvyagin
A. S. Perepelitsa
R. A. Ganeev
Optics and Spectroscopy, 2018, 124 : 681 - 686
[26] Luminescence Quantum Yield and Recombination Constants in Colloidal Core/Shell Ag2S/ZnS and Ag2S/SiO2 Quantum Dots
Ovchinnikov, O. V.
Smirnov, M. S.
Aslanov, S. V.
OPTICS AND SPECTROSCOPY, 2020, 128 (12) : 2028 - 2035
[27] Luminescence Quantum Yield and Recombination Constants in Colloidal Core/Shell Ag2S/ZnS and Ag2S/SiO2 Quantum Dots
O. V. Ovchinnikov
M. S. Smirnov
S. V. Aslanov
Optics and Spectroscopy, 2020, 128 : 2028 - 2035
[28] Ag2S quantum dots in the fields of picosecond and femtosecond UV and IR pulses: optical limiting, nonlinear absorption and refraction properties
Yue Fu
Rashid A. Ganeev
Chen Zhao
Konda Srinivasa Rao
Sandeep Kumar Maurya
Weili Yu
Ke Zhang
Chunlei Guo
Applied Physics B, 2019, 125
[29] Ag2S quantum dots in the fields of picosecond and femtosecond UV and IR pulses: optical limiting, nonlinear absorption and refraction properties
Fu, Yue
Ganeev, Rashid A.
Zhao, Chen
Rao, Konda Srinivasa
Maurya, Sandeep Kumar
Yu, Weili
Zhang, Ke
Guo, Chunlei
APPLIED PHYSICS B-LASERS AND OPTICS, 2019, 125 (01):
[30] Enhancement of Nonlinear Absorption of Nanosecond Laser Pulses in Mixtures of Ag2S Quantum Dots and Silver Nanoparticles
A. I. Zvyagin
T. A. Chevychelova
K. S. Chirkov
M. S. Smirnov
O. V. Ovchinnikov
A. S. Selyukov
A. N. Latyshev
Bulletin of the Lebedev Physics Institute, 2023, 50 : S1532 - S1535

← 1 2 3 4 5 →