Femtosecond Laser Fabrication of Hybrid Metal-Dielectric Structures with Nonlinear Photoluminescence

Photonics

Vadim Veiko¹  Filipp Komissarenko²  Ivan Mukhin²  Eduard Ageev²  Ekaterina Ponkratova²  Dmitry Zuev²  Sergei Koromyslov²  Aleksandr Kuchmizhak³  Dmitry Kudryashov⁴ 

[1] Department of Laser Photonics and Optoelectronics, ITMO University, 191002 Saint-Petersburg, Russia;Department of Physics and Engineering, ITMO University, 191002 Saint-Petersburg, Russia;Institute of Automation and Control Processes FEB RAS, 690041 Vladivostok, Russia;Nanotechnology Research and Education Center, St. Petersburg Academic University, 194021 Saint-Petersburg, Russia;

关键词: laser-induced hybrid structures;    dewetting;    metal-dielectric structures;    second harmonic generation (SHG);    broadband photoluminescence;   

DOI  :  10.3390/photonics8040121

来源: DOAJ

【 摘 要 】

Fabrication of hybrid micro- and nanostructures with a strong nonlinear response is challenging and represents a great interest due to a wide range of photonic applications. Usually, such structures are produced by quite complicated and time-consuming techniques. This work demonstrates laser-induced hybrid metal-dielectric structures with strong nonlinear properties obtained by a single-step fabrication process. We determine the influence of several incident femtosecond pulses on the Au/Si bi-layer film on produced structure morphology. The created hybrid systems represent isolated nanoparticles with a height of 250–500 nm exceeding the total thickness of the Au-Si bi-layer. It is shown that fabricated hybrid nanostructures demonstrate enhancement of the SHG signal (up to two orders of magnitude) compared to the initial planar sample and a broadband photoluminescence signal (more than 200 nm in width) in the visible spectral region. We establish the correlation between nonlinear signal and phase composition provided by Raman scattering measurements. Such laser-induced structures have significant potential in optical sensing applications and can be used as components for different nanophotonic devices.

【 授权许可】

Unknown