O. V. Ovchinnikov, A. I. Zvyagin, M. S. Smirnov, I. G. Grevtseva, S. V. Aslanov, A. Hussein
{"title":"2-巯基丙酸钝化Ag2Se量子点胶体溶液在10 ns YAG:Nd3+激光脉冲场中的非线性光学性质","authors":"O. V. Ovchinnikov, A. I. Zvyagin, M. S. Smirnov, I. G. Grevtseva, S. V. Aslanov, A. Hussein","doi":"10.1140/epjd/s10053-024-00940-5","DOIUrl":null,"url":null,"abstract":"<div><p>The results of a study of the nonlinear optical properties of Ag<sub>2</sub>Se colloidal quantum dots (QDs) passivated with 2-mercaptopropionic acid (hereinafter Ag<sub>2</sub>Se/2-MPA) with an average size of 2.0–2.5 nm in the field of 10 ns YAG:Nd<sup>3+</sup> laser pulses are presented. Using the Z-scan method in an open aperture design, it was found that the nonlinear absorption in Ag<sub>2</sub>Se/2-MPA colloidal QDs is due to reverse saturation absorption (RSA). In addition, Z-scanning in a closed-aperture scheme demonstrated nonlinear refraction, which manifested itself in the form of defocusing of the probing radiation. Dependences of the level of nonlinear absorption and refraction of laser pulses on the concentration of the Se precursor were discovered, which affects the crystallization conditions and the degree of nonstoichiometry of the formed nanocrystals, as well as the concentration of dangling bonds. The obtained patterns indicate the participation of localized states in the RSA process, and changes in the population of localized states determine the observed defocusing effect.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nonlinear optical properties of colloidal solutions of Ag2Se quantum dots passivated with 2-Mercaptopropionic acid in the field of 10 ns YAG:Nd3+ laser pulses\",\"authors\":\"O. V. Ovchinnikov, A. I. Zvyagin, M. S. Smirnov, I. G. Grevtseva, S. V. Aslanov, A. Hussein\",\"doi\":\"10.1140/epjd/s10053-024-00940-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The results of a study of the nonlinear optical properties of Ag<sub>2</sub>Se colloidal quantum dots (QDs) passivated with 2-mercaptopropionic acid (hereinafter Ag<sub>2</sub>Se/2-MPA) with an average size of 2.0–2.5 nm in the field of 10 ns YAG:Nd<sup>3+</sup> laser pulses are presented. Using the Z-scan method in an open aperture design, it was found that the nonlinear absorption in Ag<sub>2</sub>Se/2-MPA colloidal QDs is due to reverse saturation absorption (RSA). In addition, Z-scanning in a closed-aperture scheme demonstrated nonlinear refraction, which manifested itself in the form of defocusing of the probing radiation. Dependences of the level of nonlinear absorption and refraction of laser pulses on the concentration of the Se precursor were discovered, which affects the crystallization conditions and the degree of nonstoichiometry of the formed nanocrystals, as well as the concentration of dangling bonds. The obtained patterns indicate the participation of localized states in the RSA process, and changes in the population of localized states determine the observed defocusing effect.</p><h3>Graphical abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":789,\"journal\":{\"name\":\"The European Physical Journal D\",\"volume\":\"78 12\",\"pages\":\"\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2024-12-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The European Physical Journal D\",\"FirstCategoryId\":\"4\",\"ListUrlMain\":\"https://link.springer.com/article/10.1140/epjd/s10053-024-00940-5\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The European Physical Journal D","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1140/epjd/s10053-024-00940-5","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"OPTICS","Score":null,"Total":0}
Nonlinear optical properties of colloidal solutions of Ag2Se quantum dots passivated with 2-Mercaptopropionic acid in the field of 10 ns YAG:Nd3+ laser pulses
The results of a study of the nonlinear optical properties of Ag2Se colloidal quantum dots (QDs) passivated with 2-mercaptopropionic acid (hereinafter Ag2Se/2-MPA) with an average size of 2.0–2.5 nm in the field of 10 ns YAG:Nd3+ laser pulses are presented. Using the Z-scan method in an open aperture design, it was found that the nonlinear absorption in Ag2Se/2-MPA colloidal QDs is due to reverse saturation absorption (RSA). In addition, Z-scanning in a closed-aperture scheme demonstrated nonlinear refraction, which manifested itself in the form of defocusing of the probing radiation. Dependences of the level of nonlinear absorption and refraction of laser pulses on the concentration of the Se precursor were discovered, which affects the crystallization conditions and the degree of nonstoichiometry of the formed nanocrystals, as well as the concentration of dangling bonds. The obtained patterns indicate the participation of localized states in the RSA process, and changes in the population of localized states determine the observed defocusing effect.
期刊介绍：
The European Physical Journal D (EPJ D) presents new and original research results in:
Atomic Physics;
Molecular Physics and Chemical Physics;
Atomic and Molecular Collisions;
Clusters and Nanostructures;
Plasma Physics;
Laser Cooling and Quantum Gas;
Nonlinear Dynamics;
Optical Physics;
Quantum Optics and Quantum Information;
Ultraintense and Ultrashort Laser Fields.
The range of topics covered in these areas is extensive, from Molecular Interaction and Reactivity to Spectroscopy and Thermodynamics of Clusters, from Atomic Optics to Bose-Einstein Condensation to Femtochemistry.
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