Generation and elimination of polarization-dependent ablation of cubic crystals by femtosecond laser radiation

Xin Li, Wenlong Rong, Lan Jiang, Kaihu Zhang, Cong Li, Qiang Cao, Guangming Zhang, Yongfeng Lu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We experimentally showed that the π/2-period oscillation of an ablation area with laser polarization direction can be observed in GaAs, ZnSe, MgO and LiF with cubic crystal by a femtosecond laser (800 nm, 100 fs) and that the modulation in the ablation area can be controlled by the laser fluence. While the polarization dependence is sustained in a wide range of laser fluences for a narrow band-gap crystal, it is strongly suppressed with a slight augmentation of laser fluence in a wide band-gap material. The polarization-dependent ablation is explained by the crystal's orientation-dependent reduced-electron mass and the resultant contrasting nonlinear absorptions with slightly different reduced electron mass. The interplay between photoionization and avalanche ionization is discussed to interpret the influence of laser fluence on polarization-dependent ablation. Based on Keldysh's theory, polarization-dependent ablation occurs in a mixed regime between tunneling and multiphoton ionization.

Original languageEnglish (US)
Pages (from-to)30170-30176
Number of pages7
JournalOptics Express
Volume22
Issue number24
DOIs
StatePublished - Dec 1 2014

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ablation
elimination
laser beams
fluence
polarization
crystals
lasers
electron mass
ionization
avalanches
narrowband
photoionization
broadband
modulation
oscillations
augmentation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Generation and elimination of polarization-dependent ablation of cubic crystals by femtosecond laser radiation. / Li, Xin; Rong, Wenlong; Jiang, Lan; Zhang, Kaihu; Li, Cong; Cao, Qiang; Zhang, Guangming; Lu, Yongfeng.

In: Optics Express, Vol. 22, No. 24, 01.12.2014, p. 30170-30176.

Research output: Contribution to journalArticle

Li, Xin ; Rong, Wenlong ; Jiang, Lan ; Zhang, Kaihu ; Li, Cong ; Cao, Qiang ; Zhang, Guangming ; Lu, Yongfeng. / Generation and elimination of polarization-dependent ablation of cubic crystals by femtosecond laser radiation. In: Optics Express. 2014 ; Vol. 22, No. 24. pp. 30170-30176.
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AU - Cao, Qiang

AU - Zhang, Guangming

AU - Lu, Yongfeng

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