Characterization of the ablation of TeO2 crystals in air with femtosecond laser pulses

被引：10

作者：

Beke, S. ^{[1
]}

Sugioka, K. ^{[1
]}

Midorikawa, K. ^{[1
]}

Peter, A. ^{[3
]}

Nanai, L. ^{[2
]}

Bonse, J. ^{[4
]}

机构：

[1] RIKEN, Adv Sci Inst, Laser Technol Lab, Wako, Saitama 3510198, Japan

[2] Univ Szeged, Dept Phys, JGYTFK, H-6720 Szeged, Hungary

[3] Hungarian Acad Sci, Crystal Phys Res Lab, H-1502 Budapest, Hungary

[4] BAM Fed Inst Mat Res & Testing, D-12205 Berlin, Germany

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2010年 / 43卷 / 02期

基金：

日本学术振兴会;

关键词：

DIELECTRICS; SINGLE;

D O I：

10.1088/0022-3727/43/2/025401

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Femtosecond (fs) laser pulse ablation (pulse duration of 150 fs, wavelength of 775 nm, repetition rate of 1 kHz) of single-crystalline TeO2 surfaces was performed in air using the direct focusing technique. The lateral and vertical dimensions of laser ablated craters as well as the laser damage thresholds were evaluated for different pulse numbers applied to the same spot. The joint observation using optical microscopy, atomic force microscopy and scanning electron microscopy revealed the surface morphology of the ablated craters and also showed that the ablation threshold depends significantly on the number of laser pulses applied to the same spot due to incubation effects. The incubation effects change the absorption processes involved in fs-laser ablation of the transparent material from multiphoton absorption to a single-photon absorption. These results are discussed on the basis of recent models of the interaction of fs-laser pulses with dielectrics.

引用

页数：6

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