Dynamics of optically excited tungsten and silicon for ripples formation

Hao Zhang, Chen Li, Jean Philippe Colombier, Guanghua Cheng, Razvan Stoian

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

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.

Original languageEnglish
Title of host publicationLaser-Based Micro- and Nanoprocessing IX
EditorsUdo Klotzbach, Kunihiko Washio, Craig B. Arnold
PublisherSPIE
ISBN (Electronic)9781628414417
DOIs
StatePublished - 2015
Externally publishedYes
EventLaser-Based Micro- and Nanoprocessing IX - San Francisco, United States
Duration: 10 Feb 201512 Feb 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9351
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceLaser-Based Micro- and Nanoprocessing IX
Country/TerritoryUnited States
CitySan Francisco
Period10/02/1512/02/15

Keywords

  • FDTD
  • Femtosecond pump-probe
  • Laser-induced periodic surface structures

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