Open AccessFemtosecond laser-induced spatial-frequency-shifted nanostructures by polarization ellipticity modulation
Author(s) -
Hao Cheng,
Sheng Liu,
Peng Li,
Feng Liu,
Lei Han,
Qi Shu,
Jinzhan Zhong,
Xuyue Guo,
Jianlin Zhao
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434363
Subject(s) - femtosecond , optics , materials science , laser , polarization (electrochemistry) , surface plasmon polariton , silicon , zinc selenide , optoelectronics , nanostructure , wavelength , plasmon , surface plasmon , nanotechnology , physics , chemistry
We demonstrate a prominent spatial frequency shift (SFS) for the femtosecond laser-induced periodic structures by only changing the polarization ellipticity of the working laser. The nanostructures are fabricated on the surfaces of silicon (Si) and zinc selenide (ZnSe) using elliptically polarized femtosecond laser pulses, with the pulse duration of 35 fs, the central wavelength of 800nm, and the repetition rate of 1kHz. The experimental results show that the red- and blue-shift trends of the SFS are individually represented on silicon and zinc selenide with the increased polarization ellipticity, where low- and high-spatial-frequency nano-ripples are fabricated, respectively. These unique phenomena are explained by using the laser-surface plasmon polariton interference mechanism and the effective medium theory. The proposed nanostructures with regulatable period are further used for creating nano-gratings on silicon which perform chirped characteristics.