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Title: Derivation of effective penetration depth of femtosecond laser pulses in metal from ablation rate dependence on laser fluence, incidence angle, and polarization
Authors: Miyasaka, Yasuhiro
Hashida, Masaki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-4834-0138 (unconfirmed)
Nishii, Takaya
Inoue, Shunsuke  kyouindb  KAKEN_id
Sakabe, Shuji  kyouindb  KAKEN_id
Author's alias: 阪部, 周二
Issue Date: 5-Jan-2015
Publisher: American Institute of Physics
Journal title: Applied Physics Letters
Volume: 106
Issue: 1
Thesis number: 013101
Abstract: Ablation rate dependence on laser fluence for copper subjected to oblique femtosecond laser irradiation has been determined experimentally in order to investigate processing induced by oblique irradiation. A difference of ablation rate between p-polarized and s-polarized oblique irradiation is clearly observed. Effective penetration depth is defined to explain the ablation rate dependence instead of using optical penetration depth, which is treated as a key value for determining the ablation rate in conventional theory. The effective penetration depth for copper is presented in simple formulas as a function of laser incidence angle for each polarization.
Rights: © 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
URI: http://hdl.handle.net/2433/196777
DOI(Published Version): 10.1063/1.4905353
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