Integrated continuum-atomistic modeling of nonthermal ablation of gold nanofilms by femtosecond lasers

被引：47

作者：

Gan, Yong ^{[1
]}

Chen, J. K. ^{[1
]}

机构：

[1] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 20期

关键词：

gold; laser ablation; metallic thin films; molecular dynamics method; nanostructured materials; MOLECULAR-DYNAMICS; METALS; FILMS; PULSES; IRRADIATION; MECHANISMS;

D O I：

10.1063/1.3142878

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ultrafast nonthermal ablation of gold nanofilms is studied using a combined two-temperature model and molecular dynamics method. The results show that for thinner films the tensile stress is directly reversed from the initially generated compressive stress. For thicker films, on the other hand, the tensile stress wave is reflected from the irradiated surface. The key driving force for ultrafast nonthermal material ablation is conventional thermal stress, instead of the hot electron blast force.

引用

页数：3

共 20 条

[1] Thresholds for front-side ablation and rear-side spallation of metal foil irradiated by femtosecond laser pulse [J].

Anisimov, S. I. ;

Inogamov, N. A. ;

Petrov, Y. V. ;

Khokhlov, V. A. ;

Zhakhovskii, V. V. ;

Nishihara, K. ;

Agranat, M. B. ;

Ashitkov, S. I. ;

Komarov, P. S. .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2008, 92 (04) :797-801

[2] A semiclassical two-temperature model for ultrafast laser heating [J].

Chen, JK ;

Tzou, DY ;

Beraun, JE .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2006, 49 (1-2) :307-316

[3] Modeling of femtosecond laser-induced non-equilibrium deformation in metal films [J].

Chen, JK ;

Beraun, JE ;

Grimes, LE ;

Tzou, DY .

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2002, 39 (12) :3199-3216

[4] EMBEDDED-ATOM METHOD - DERIVATION AND APPLICATION TO IMPURITIES, SURFACES, AND OTHER DEFECTS IN METALS [J].

DAW, MS ;

BASKES, MI .

PHYSICAL REVIEW B, 1984, 29 (12) :6443-6453

[5] Electron-lattice kinetics of metals heated by ultrashort laser pulses [J].

Falkovsky, LA ;

Mishchenko, EG .

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS, 1999, 88 (01) :84-88

[6] Combined atomistic-continuum modeling of short-pulse laser melting and disintegration of metal films [J].

Ivanov, DS ;

Zhigilei, LV .

PHYSICAL REVIEW B, 2003, 68 (06)

[7] Nanotexturing of gold films by femtosecond laser-induced melt dynamics [J].

Koch, J ;

Korte, F ;

Bauer, T ;

Fallnich, C ;

Ostendorf, A ;

Chichkov, BN .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2005, 81 (02) :325-328

[8] Nanostructuring of thin gold films by femtosecond lasers [J].

Kuznetsov, A. I. ;

Koch, J. ;

Chichkov, B. N. .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2009, 94 (02) :221-230

[9] Thermoelastic modeling of microbump and nanojet formation on nanosize gold films under femtosecond laser irradiation [J].

Meshcheryakov, YP ;

Bulgakova, NM .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 82 (02) :363-368

[10] Ablation of metals by ultrashort laser pulses [J].

Nolte, S ;

Momma, C ;

Jacobs, H ;

Tunnermann, A ;

Chichkov, BN ;

Wellegehausen, B ;

Welling, H .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1997, 14 (10) :2716-2722

← 1 2 →