Article

Nonlinear Absorption of the Films Containing Ag <sub>2</sub> S, Ag <sub>2</sub> Se, PbS, and PbSe Quantum Dots Using 1030nm and 515nm Pulses

R. A. GaneevDepartment of Optics and Spectroscopy, Voronezh State University, 1 University Square, Voronezh 394006, RussiaY. A. BuriyevArifov Institute of Ion–Plasma and Laser Technologies, 33 Dormon Yoli Street, Tashkent 100125, UzbekistanVyacheslav V. KimInstitute for Advanced Studies, New Uzbekistan University, Movarounnahr 1, Tashkent 100007, UzbekistanA. A. IsroilovDepartment of Physics, Faculty of Physics and Chemistry, Chirchik State Pedagogical University, 104 Amir Temur, Chirchik 111700, UzbekistanSh. R. KamalovArifov Institute of Ion–Plasma and Laser Technologies, 33 Dormon Yoli Street, Tashkent 100125, UzbekistanB. EshchanovDepartment of Physics, Faculty of Physics and Chemistry, Chirchik State Pedagogical University, 104 Amir Temur, Chirchik 111700, UzbekistanS. V. AslanovDepartment of Optics and Spectroscopy, Voronezh State University, 1 University Square, Voronezh 394006, RussiaA. I. ZvyaginDepartment of Optics and Spectroscopy, Voronezh State University, 1 University Square, Voronezh 394006, RussiaM. S. SmirnovDepartment of Optics and Spectroscopy, Voronezh State University, 1 University Square, Voronezh 394006, RussiaO. V. OvchinnikovDepartment of Optics and Spectroscopy, Voronezh State University, 1 University Square, Voronezh 394006, Russia

Journal of Nonlinear Optical Physics & Materialsjournal2025en

ABI

Abstract

The saturable absorption and two-photon absorption (TPA) of the thin films containing the quantum dots (QD) of several metal sulfides and selenides (Ag 2 S, PbS, Ag 2 Se, and PbSe) are studied using the 1,030[Formula: see text]nm and 515[Formula: see text]nm, 200 fs probe pulses. The prevailing role of saturable absorption and TPA in films was determined by varying the intensity of the probe pulses. The nonlinear optical parameters of the above processes are calculated. The strong TPA in PbS and PbSe QD films in the case of the 515[Formula: see text]nm probe pulses is revealed. The growth of the nonlinear absorption in the QD films compared to the colloids containing similar species is attributed to the growing influence of the local field introduced by QDs in the films. The potential applications of the studied QD films are discussed.

Topics

Nonlinear Optical Materials Studies Quantum Dots Synthesis And Properties Laser-Ablation Synthesis of Nanoparticles

Identifiers

DOI: 10.1142/s0218863525500559

Citations and references

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