Open AccessPeriodic nanostructures on titanium dioxide film produced using femtosecond laser with wavelengths of 388 nm and 775 nm
Author(s) -
Togo Shiaga,
Masahiro Tsukamoto,
Godai Miyaji
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.014696
Subject(s) - femtosecond , materials science , laser , wavelength , nanostructure , optoelectronics , optics , titanium dioxide , surface plasmon polariton , titanium , thin film , nanotechnology , surface plasmon , plasmon , composite material , physics , metallurgy
Titanium dioxide (TiO2) film is an important biomaterial used to improve the biocompatibility of titanium (Ti). We have used a film coating method with an aerosol beam and femtosecond laser irradiation to form periodic structures on biomaterials for control of the cell spreading. The control of cell spreading on biomaterials is important for the development of advanced biomaterials. In this study, nanostructures with periods of 130 and 230 nm were formed on a film using a femtosecond laser with wavelengths of 388 and 775 nm, respectively. The nanostructure period on the film was 30% of the laser wavelengths. Periods produced with wavelengths of 388 and 775 nm were calculated using a surface plasmon polariton (SPP) model and the experimental results for both wavelengths were in the range of the calculated periods, which suggests that the mechanism for the formation of the periodic nanostructures on the film with a femtosecond laser was due to the excitation of SPPs.