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Proceedings Paper

Dynamics of optically excited tungsten and silicon for ripples formation
Author(s): Hao Zhang; Chen Li; Jean-Philippe Colombier; Guanghua Cheng; Razvan Stoian
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Paper Abstract

We measured the dielectric constant of optically excited silicon and tungsten using a dual-angle femtosecond reflectivity pump-probe technique. The energy deposition in the formation of laser-induced periodic surface structures (LIPSS) is then investigated by simulating the laser pulse interaction with an initially random distributed rough surface using 3D-Finite Difference Time Domain (FDTD) method, with the measured dielectric constant as a material input. We found in the FDTD simulation periodic energy deposition patterns both perpendicular and parallel to the laser polarization. The origin of them are discussed for originally plasmonic and non-plasmonic material.

Paper Details

Date Published: 12 March 2015
PDF: 9 pages
Proc. SPIE 9351, Laser-based Micro- and Nanoprocessing IX, 93510H (12 March 2015); doi: 10.1117/12.2076593
Show Author Affiliations
Hao Zhang, Lab. Hubert Curien CNRS (France)
Chen Li, Lab. Hubert Curien CNRS (France)
Xian Institute of Optics and Precision Mechanics (China)
Jean-Philippe Colombier, Lab. Hubert Curien CNRS (France)
Guanghua Cheng, Xian Institute of Optics and Precision Mechanics (China)
Razvan Stoian, Lab. Hubert Curien CNRS (France)

Published in SPIE Proceedings Vol. 9351:
Laser-based Micro- and Nanoprocessing IX
Udo Klotzbach; Kunihiko Washio; Craig B. Arnold, Editor(s)

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