TY - JOUR
T1 - High-spatial-frequency periodic surface structures on steel substrate induced by subnanosecond laser pulses
AU - Hikage, Haruki
AU - Nosaka, Nami
AU - Matsuo, Shigeki
N1 - Funding Information:
Acknowledgment This work was partially supported by JSPS KAKENHI Grant Number JP26289019.
Publisher Copyright:
© 2017 The Japan Society of Applied Physics.
PY - 2017/11
Y1 - 2017/11
N2 - By irradiation with 0.5 ns laser pulses at a wavelength λ = 1.064 m, laser-induced periodic surface structures (LIPSS) were fabricated on a steel substrate. In addition to low-spatial-frequency LIPSS (LSFL), a high-spatial-frequency LIPSS (HSFL) of period Λ ∼ 0.4λ with two-dimensional expansion was formed, although it is generally recognized that HSFL are formed only by ultrafast laser pulses. The wavevector of the observed HSFL was perpendicular to the electric field of the irradiated laser pulse (each ridge/groove of the HSFL was parallel to the electric field). We discuss the relationship between the formation of HSFL and the pulse duration.
AB - By irradiation with 0.5 ns laser pulses at a wavelength λ = 1.064 m, laser-induced periodic surface structures (LIPSS) were fabricated on a steel substrate. In addition to low-spatial-frequency LIPSS (LSFL), a high-spatial-frequency LIPSS (HSFL) of period Λ ∼ 0.4λ with two-dimensional expansion was formed, although it is generally recognized that HSFL are formed only by ultrafast laser pulses. The wavevector of the observed HSFL was perpendicular to the electric field of the irradiated laser pulse (each ridge/groove of the HSFL was parallel to the electric field). We discuss the relationship between the formation of HSFL and the pulse duration.
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U2 - 10.7567/APEX.10.112701
DO - 10.7567/APEX.10.112701
M3 - Article
AN - SCOPUS:85039156399
SN - 1882-0778
VL - 10
JO - Applied Physics Express
JF - Applied Physics Express
IS - 11
M1 - 112701
ER -