研究目的
Investigating the polarization dependent optical response of periodically nanostructured SiO2-Ag nanocomposite material formed by interference laser writing.
研究成果
The laser-induced formation of a polarization-selective nanocomposite metasurface allows precise control of the effect that is essential for practical application in photonics devices and optical filters. The observed effect is promising for many applications, such as nonlinear optical filtration, polarisation splitting and switching.
研究不足
The controlled synthesis of metallic NPs in nanostructures and deep modification of the structure of the SiO2 matrix itself remains a complex gear.
1：Experimental Design and Method Selection:
The study involves the use of a two-beam interference scheme with picosecond laser pulses for the synthesis of periodic structures in a sol-gel film impregnated with silver nitrate.
2：Sample Selection and Data Sources:
Thin mesoporous SiO2 films with a thickness of 170±10 nm elaborated by sol-gel technique on a glass substrate were used.
3：List of Experimental Equipment and Materials:
Third harmonic of solid-state Nd:YAG picosecond laser was used as a laser source.
4：Experimental Procedures and Operational Workflow:
The laser beam was split by the phase diffraction grating and then two beams of the 1st diffraction order were subtracted by the spatial filter. The obtained two beam interference pattern was used for a controlled formation of a grating-like structure on the surface.
5：Data Analysis Methods:
The optical properties of the obtained structures were analyzed using scanning electron microscopy (SEM) and transmission microimages.
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