Low-threshold ablation of dielectrics irradiated by picosecond soft x-ray laser pulses

被引：45

作者：

Faenov, A. Ya ^{[1
,2
]}

Inogamov, N. A. ^{[3
]}

Zhakhovskii, V. V. ^{[2
,4
]}

Khokhlov, V. A. ^{[3
]}

Nishihara, K. ^{[4
]}

Kato, Y. ^{[1
,5
]}

Tanaka, M. ^{[1
]}

Pikuz, T. A. ^{[1
,2
]}

Kishimoto, M. ^{[1
]}

Ishino, M. ^{[1
]}

Nishikino, M. ^{[1
]}

Nakamura, T. ^{[1
]}

Fukuda, Y. ^{[1
]}

Bulanov, S. V. ^{[1
]}

Kawachi, T. ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Kansai Photon Sci Inst, Kizu, Kyoto 6190215, Japan

[2] Russian Acad Sci, Joint Inst High Temperatures, Moscow 125412, Russia

[3] Russian Acad Sci, LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia

[4] Inst Laser Engn, Suita, Osaka 5650871, Japan

[5] New Photon Ind, Grad Sch Creat, Shizuoka 4311202, Japan

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 23期

关键词：

dielectric materials; heat conduction; laser ablation; lithium compounds; 13.9; NM; BEAM;

D O I：

10.1063/1.3152290

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ablation of LiF crystal by soft x-ray laser (XRL) pulses with wavelength lambda=13.9 nm and duration T(L)=7 ps is studied experimentally and theoretically. It is found that a crater appears on a surface of LiF for XRL fluence, exceeding the ablation threshold F(a)similar to 10.2 mJ/cm(2) in one shot, or 5 mJ/cm(2) in each of the three XRL shots. This is substantially below the ablation thresholds obtained with other lasers having longer pulse duration and/or longer wavelength. A mechanism of thermomechanical ablation in large bandgap dielectrics is proposed. The theory explains the low F(a) via small attenuation depth, absence of light reflection, and electron heat conductivity.

引用

页数：3

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