Microscopic mechanism of ultrashort-pulse laser ablation of metals: a molecular dynamics study incorporating electronic entropy effects

被引：2

作者：

Tanaka, Yuta ^{[1
]}

Tsuneyuki, Shinji ^{[1
]}

机构：

[1] Univ Tokyo, Dept Phys, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1130033, Japan

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2023年 / 56卷 / 38期

基金：

日本学术振兴会;

关键词：

metal; laser ablation; ultrashort-pulse; molecular dynamics; electronic entropy; WARM DENSE MATTER; COULOMB EXPLOSION; FEMTOSECOND; FILMS; CONDUCTIVITY; COEFFICIENT; TRANSITION; PRESSURE; MODEL;

D O I：

10.1088/1361-6463/acdb81

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The microscopic mechanism of metal ablation induced by ultrashort laser pulse irradiation is investigated. A two-temperature model scheme combined with molecular dynamics (TTM-MD) is developed to incorporate electronic entropy effects into the simulation of metal ablation while satisfying the energy conservation law. Simulation with the TTM-MD scheme reveals that ultrashort laser pulse irradiation near the ablation threshold causes high-energy atom/ion emission and sub-nanometer depth ablation, as observed experimentally, due to the electronic entropy effect. It is also shown that the electronic entropy effect is also significant in spallation.

引用

页数：14

共 71 条

[11] Structural dynamics of laser-irradiated gold nanofilms [J].

Daraszewicz, Szymon L. ;

Giret, Yvelin ;

Naruse, Nobuyasu ;

Murooka, Yoshie ;

Yang, Jinfeng ;

Duffy, Dorothy M. ;

Shluger, Alexander L. ;

Tanimura, Katsumi .

PHYSICAL REVIEW B, 2013, 88 (18)

[12] FEMTOSECOND THERMOREFLECTIVITY AND THERMOTRANSMISSIVITY OF POLYCRYSTALLINE AND SINGLE-CRYSTALLINE GOLD-FILMS [J].

ELSAYEDALI, HE ;

JUHASZ, T ;

SMITH, GO ;

BRON, WE .

PHYSICAL REVIEW B, 1991, 43 (05) :4488-4491

[13] TIME-RESOLVED OBSERVATION OF ELECTRON-PHONON RELAXATION IN COPPER [J].

ELSAYEDALI, HE ;

NORRIS, TB ;

PESSOT, MA ;

MOUROU, GA .

PHYSICAL REVIEW LETTERS, 1987, 58 (12) :1212-1215

[14] The Formation of Warm Dense Matter: Experimental Evidence for Electronic Bond Hardening in Gold [J].

Ernstorfer, Ralph ;

Harb, Maher ;

Hebeisen, Christoph T. ;

Sciaini, German ;

Dartigalongue, Thibault ;

Miller, R. J. Dwayne .

SCIENCE, 2009, 323 (5917) :1033-1037

[15]

FOJTIK A, 1993, BER BUNSEN PHYS CHEM, V97, P252

[16] Atomistic simulation of femtosecond laser pulse interactions with a copper film: Effect of dependency of penetration depth and reflectivity on electron temperature [J].

Foumani, A. Amouye ;

Niknam, A. R. .

JOURNAL OF APPLIED PHYSICS, 2018, 123 (04)

[17] Integrated continuum-atomistic modeling of nonthermal ablation of gold nanofilms by femtosecond lasers [J].

Gan, Yong ;

Chen, J. K. .

APPLIED PHYSICS LETTERS, 2009, 94 (20)

[18] Entropy Driven Atomic Motion in Laser-Excited Bismuth [J].

Giret, Y. ;

Gelle, A. ;

Arnaud, B. .

PHYSICAL REVIEW LETTERS, 2011, 106 (15)

[19] Ablation threshold dependence on pulse duration for copper [J].

Hashida, M ;

Semerok, AF ;

Gobert, O ;

Petite, G ;

Izawa, Y ;

Wagner, JF .

APPLIED SURFACE SCIENCE, 2002, 197 :862-867

[20]

Hashida M., 1999, P SPIE, V4423, P178, DOI [10.1117/12.431220, DOI 10.1117/12.431220]

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