2024-03-29T14:10:45Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1114652021-06-07T13:05:19Zcom_10261_31com_10261_3com_10261_93com_10261_4col_10261_284col_10261_346
00925njm 22002777a 4500
dc
Ruiz de la Cruz, A.
author
Lahoz, Ruth
author
Siegel, Jan
author
Fuente, Germán F. de la
author
Solís Céspedes, Javier
author
2014
We report on the fabrication of laser-induced periodic surface structures in Cr films upon high repetition rate fs laser irradiation (up to 1 MHz, 500 fs, 1030 nm), employing beam scanning. Highly regular large-area (9 cm2) gratings with a relative diffraction efficiency of 42% can be produced within less than 6 min. The ripple period at moderate and high fluences is 0.9 μm, with a small period of 0.5 μm appearing at lower energies. The role of the irradiation parameters on the characteristics of the laser-induced periodic surface structures (LIPSS) is studied and discussed in the frame of the models presently used. We have identified the polarization vector orientation with respect to the scan direction as a key parameter for the fabrication of high-quality, large-area LIPSS, which, for perpendicular orientation, allows the coherent extension of the sub-wavelength structure over macroscopic distances. The processing strategy is robust in terms of broad parameter windows and applicable to other materials featuring LIPSS. © 2014 Optical Society of America.
Optics Letters 39(8): 2491-2494 (2014)
http://hdl.handle.net/10261/111465
10.1364/OL.39.002491
http://dx.doi.org/10.13039/501100003329
High speed inscription of uniform, large-area laser-induced periodic surface structures in Cr films using a high repetition rate fs laser