Crystal orientation dependence of femtosecond laser-induced periodic surface structure on (100) silicon

Lan Jiang, Weina Han, Xiaowei Li, Qingsong Wang, Fantong Meng, Yongfeng Lu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

It is widely believed that laser-induced periodic surface structures (LIPSS) are independent of material crystal structures. This Letter reports an abnormal phenomenon of strong dependence of the anisotropic formation of periodic ripples on crystal orientation, when Si (100) is processed by a linearly polarized femtosecond laser (800 nm, 50 fs, 1 kHz). LIPSS formation sensitivity with a π?2 modulation is found along different crystal orientations with a quasicosinusoid function when the angle between the crystal orientation and polarization direction is changed from 0° to 180°. Our experiments indicate that it is much easier (or more difficult) to form ripple structures when the polarization direction is aligned with the lattice axis [011]/[011] (or [001]). The modulated nonlinear ionization rate along different crystal orientations, which arises from the direction dependence of the effective mass of the electron is proposed to interpret the unexpected anisotropic LIPSS formation phenomenon. Also, we demonstrate that the abnormal phenomenon can be applied to control the continuity of scanned ripple lines along different crystal orientations.

Original languageEnglish (US)
Pages (from-to)3114-3117
Number of pages4
JournalOptics Letters
Volume39
Issue number11
DOIs
StatePublished - Jun 1 2014

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ripples
silicon
crystals
lasers
polarization
continuity
modulation
ionization
crystal structure
sensitivity
electrons

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Crystal orientation dependence of femtosecond laser-induced periodic surface structure on (100) silicon. / Jiang, Lan; Han, Weina; Li, Xiaowei; Wang, Qingsong; Meng, Fantong; Lu, Yongfeng.

In: Optics Letters, Vol. 39, No. 11, 01.06.2014, p. 3114-3117.

Research output: Contribution to journalArticle

Jiang, Lan ; Han, Weina ; Li, Xiaowei ; Wang, Qingsong ; Meng, Fantong ; Lu, Yongfeng. / Crystal orientation dependence of femtosecond laser-induced periodic surface structure on (100) silicon. In: Optics Letters. 2014 ; Vol. 39, No. 11. pp. 3114-3117.
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