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Induced Birefringence in CdSe Quantum Dots in Phosphate Glass Matrix

Authors
  • Krasovskii, V. I.1
  • Rasmagin, S. I.1
  • 1 Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russia , Moscow (Russia)
Type
Published Article
Journal
Optics and Spectroscopy
Publisher
Pleiades Publishing
Publication Date
Jan 01, 2021
Volume
129
Issue
1
Pages
102–109
Identifiers
DOI: 10.1134/S0030400X21010112
Source
Springer Nature
Keywords
License
Yellow

Abstract

AbstractLight-induced anisotropy (optical Kerr optical) caused by the third-order nonlinear susceptibility χ(3) in a nanocomposite material consisting of CdSe quantum dots in phosphate glass is observed experimentally. The signs and values of the off-diagonal χ(3) tensor components are determined using Z-scan technique and nonlinear ellipsometry. It is shown that the nonlinear response contains three time components; the fastest component duration does not exceed 20 ps, the intermediate component is exponential and decays for 90 ± 11 and 385 ± 30 ps for different samples, and the longest component is nonexponential with a duration on the order of nanoseconds. Switching of the optical signal with a time not exceeding 20 ps is demonstrated.

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