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Laser-affected structure and optical properties of semiconductor thin films with Ag nanoparticles

Tuesday (23.06.2020)
12:10 - 12:30 Room 2
Part of:

Particular attention has been attracted to thin films (SGF) with embedded nanoparticles. Sol-gel technology has proven to be one of the most promising and effective methods for the formation of such nanocomposite films. As a result, it is possible to prepare thin films such as TiO2, ZnO, AlZnO doped with nanoparticles (Ag, Au, Cu, Co, Er, etc.).

The ability to predict the optical properties of composites during their production and/or after laser processing is crucial in the development of new functional materials. Commonly, such task requires the determination of stable phenomenological relationships between experimental and computational results. In this work, we propose an improved effective medium theory and simulate the optical properties. Two types of SGF (thickness 100-200 nm) deposited on fused silica were used: AlZnO films with/without Ag nanoparticles. The film structure was modified by laser radiation activating two mechanisms such as photo-thermo-chemical synthesis as well as thermal action (fig. 1). The results were achieved by using two different laser sources: NIR (1064 nm) and NUV (355 and 405 nm). The wavelengths of these sources is far and near the plasmon resonance of the used nanoparticles. Additionally, the peculiarities of laser-induced refractive index and extinction coefficient change were investigated.

Dr. Maksim Sergeev
ITMO University
Additional Authors:
  • Vladislav Gresko
    ITMO University
  • Yaroslava Andreeva
    ITMO University
  • Pavel Varlamov
    ITMO University
  • Dr. Elena Shirshneva-Vaschenko
    ITMO University
  • Lilia Sokura
    ITMO University
  • Prof. Dr. Vadim Veiko
    ITMO University
  • Prof. Francis Vocanson
    Univ. Lyon
  • Prof. Dr. Tatiana Itina
    Univ. Lyon


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Extended Abstract M. Sergeev et al. ver. 1 abstract 184 KB Download