%0 Journal Article
%T In the Heart of Femtosecond Laser Induced Nanogratings: From Porous Nanoplanes to Form Birefringence
%A R. Desmarchelier
%A B. Poumellec
%A F. Brisset
%A S. Mazerat
%A M. Lancry
%J World Journal of Nano Science and Engineering
%P 115-125
%@ 2161-4962
%D 2015
%I Scientific Research Publishing
%R 10.4236/wjnse.2015.54014
%X It is demonstrated that the form birefringence related to the so-called nanogratings is quantitatively correlated to the porosity-filling factor of these nanostructures. We reveal that matters surrounding the nanopores exhibit significant refractive index decrease which is likely due to the fictive temperature increase and/or the presence of a significant amount of interstitial O<sub>2</sub>. The control of the porosity was achieved by adjusting the laser pulse energy and the number of pulses/micron <i>i.e.</i> the overlapping rate. Applications can be numerous in fast material processing by the production of nanoporous matter, and photonics by changing the optical properties.
%K Silica
%K Glasses
%K Nanoporous
%K Femtosecond Laser Processing
%K Birefringence
%K Nanogratings
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=61074