Ablation mechanism of fused silica under femtosecond laser pulse

Shizhen Xu; Zhizhan Xu; Tianqin Jia; Haiyi Sun; Xiaoxi Li; Donghai Feng; Chengbin Li

doi:10.1117/12.575480

Ablation mechanism of fused silica under femtosecond laser pulse

Shizhen Xu^*, Zhizhan Xu, Tianqin Jia, Haiyi Sun, Xiaoxi Li, Donghai Feng, Chengbin Li

^*Corresponding author for this work

CAS - Shanghai Institute of Optics and Fine Mechanics

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

Based on the avalanche model, the mechanism of femtosecond laser-induced ablation in fused silica was investigated. The three microscopic processes, including the production of conduction band electrons (CBE), the deposition of laser energy, and the diffusion of CBE and energy, were solved by a finite element method (FEM) of two-dimension cylinder coordinate. The conduction band electrons (CBE) were produced through photoionization and impact ionization, which were calculated via Keldysh theory and Double-flux model, respectively. The accumulated charge and the electrostatic field were also calculated, and the evolution of microexplosion was discussed based on this model. The results indicate that the CBE and energy diffusion plays an important role in the ablation of dielectrics by femtosecond laser pulse.

Original language	English
Article number	44
Pages (from-to)	291-298
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5629
DOIs	https://doi.org/10.1117/12.575480
State	Published - 2005
Externally published	Yes
Event	Lasers in Material Processing and Manufacturing II - Beijing, China Duration: 10 Nov 2004 → 12 Nov 2004

Keywords

Avalanche model
Femtosecond laser pulse
Finite element method
Laser ablation
Microexplosion

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10.1117/12.575480

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title = "Ablation mechanism of fused silica under femtosecond laser pulse",

abstract = "Based on the avalanche model, the mechanism of femtosecond laser-induced ablation in fused silica was investigated. The three microscopic processes, including the production of conduction band electrons (CBE), the deposition of laser energy, and the diffusion of CBE and energy, were solved by a finite element method (FEM) of two-dimension cylinder coordinate. The conduction band electrons (CBE) were produced through photoionization and impact ionization, which were calculated via Keldysh theory and Double-flux model, respectively. The accumulated charge and the electrostatic field were also calculated, and the evolution of microexplosion was discussed based on this model. The results indicate that the CBE and energy diffusion plays an important role in the ablation of dielectrics by femtosecond laser pulse.",

keywords = "Avalanche model, Femtosecond laser pulse, Finite element method, Laser ablation, Microexplosion",

author = "Shizhen Xu and Zhizhan Xu and Tianqin Jia and Haiyi Sun and Xiaoxi Li and Donghai Feng and Chengbin Li",

year = "2005",

doi = "10.1117/12.575480",

language = "英语",

volume = "5629",

pages = "291--298",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "SPIE",

note = "Lasers in Material Processing and Manufacturing II ; Conference date: 10-11-2004 Through 12-11-2004",

}

TY - JOUR

T1 - Ablation mechanism of fused silica under femtosecond laser pulse

AU - Xu, Shizhen

AU - Xu, Zhizhan

AU - Jia, Tianqin

AU - Sun, Haiyi

AU - Li, Xiaoxi

AU - Feng, Donghai

AU - Li, Chengbin

PY - 2005

Y1 - 2005

N2 - Based on the avalanche model, the mechanism of femtosecond laser-induced ablation in fused silica was investigated. The three microscopic processes, including the production of conduction band electrons (CBE), the deposition of laser energy, and the diffusion of CBE and energy, were solved by a finite element method (FEM) of two-dimension cylinder coordinate. The conduction band electrons (CBE) were produced through photoionization and impact ionization, which were calculated via Keldysh theory and Double-flux model, respectively. The accumulated charge and the electrostatic field were also calculated, and the evolution of microexplosion was discussed based on this model. The results indicate that the CBE and energy diffusion plays an important role in the ablation of dielectrics by femtosecond laser pulse.

AB - Based on the avalanche model, the mechanism of femtosecond laser-induced ablation in fused silica was investigated. The three microscopic processes, including the production of conduction band electrons (CBE), the deposition of laser energy, and the diffusion of CBE and energy, were solved by a finite element method (FEM) of two-dimension cylinder coordinate. The conduction band electrons (CBE) were produced through photoionization and impact ionization, which were calculated via Keldysh theory and Double-flux model, respectively. The accumulated charge and the electrostatic field were also calculated, and the evolution of microexplosion was discussed based on this model. The results indicate that the CBE and energy diffusion plays an important role in the ablation of dielectrics by femtosecond laser pulse.

KW - Avalanche model

KW - Femtosecond laser pulse

KW - Finite element method

KW - Laser ablation

KW - Microexplosion

UR - https://www.scopus.com/pages/publications/18944391351

U2 - 10.1117/12.575480

DO - 10.1117/12.575480

M3 - 会议文章

AN - SCOPUS:18944391351

SN - 0277-786X

VL - 5629

SP - 291

EP - 298

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

M1 - 44

T2 - Lasers in Material Processing and Manufacturing II

Y2 - 10 November 2004 through 12 November 2004

ER -

Ablation mechanism of fused silica under femtosecond laser pulse

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Keywords

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