Nonequilibrium optical properties of transition metals upon ultrafast electron heating

被引:40
作者
Bevillon, E. [1 ]
Stoian, R. [1 ]
Colombier, J. P. [1 ]
机构
[1] UJM St Etienne, Univ Lyon, Grad Sch, CNRS,Inst Opt,Lab Hubert Curien,UMR 5516, F-42023 St Etienne, France
关键词
ultrafast photoexcitation; nonequilibrium optical properties; laser material interaction; density functional theory; Kubo-Greenwood calculations; FEMTOSECOND LASER-PULSES; ABSORPTION; SIMULATION; MATTER; COPPER;
D O I
10.1088/1361-648X/aad8e5
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Femtosecond laser excitation of metals triggers swift modifications of the electronic distribution within the band structure. This has direct consequences on optical transitions transiently modifying the optical properties of materials. Influencing in real time the action of the pulse, these changes lead to substantial variations of the amount and the distribution in the energy deposited during the laser irradiation. The effect of the laser pulse can be described considering electrons heated to a range of electronic temperatures. In order to evaluate the dielectric response of ultrafast heated electrons, we performed ab initio molecular dynamic simulations coupled to the Kubo-Greenwood formalism and determined electronic temperature dependent optical properties. A series of representative transition metals was investigated: Cu, Ni, Cr, W, Ti, and Fe. The evolution of the optical properties is optically-pumped based on electronic redistribution within the density of electronic states. The proposed interpretation rely on modifications of the energy range of occupied states undergoing optical electronic transitions. It is found that the degree of filling and the shape of the d-block drive the dynamics of optical processes. Nonequilibrium optical indices, reflectivities and skin depths are reported for electron thermal excitation relevant to near-threshold laser ablation regimes. The effect of the electron temperature on optical properties allows to reconstruct and model ultrafast excitation dynamics in time-resolved diagnostics with relevance in laser micro- and nano-processing.
引用
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页数:11
相关论文
共 45 条
[1]   Ultrafast switching of surface plasmonic conditions in nonplasmonic metals [J].
Bevillon, E. ;
Colombier, J. P. ;
Recoules, V. ;
Zhang, H. ;
Li, C. ;
Stoian, R. .
PHYSICAL REVIEW B, 2016, 93 (16)
[2]   Ab Initio Nonequilibrium Thermodynamic and Transport Properties of Ultrafast Laser Irradiated 316L Stainless Steel [J].
Bevillon, E. ;
Colombier, J. P. ;
Dutta, B. ;
Stoian, R. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2015, 119 (21) :11438-11446
[3]   Free-electron properties of metals under ultrafast laser-induced electron-phonon nonequilibrium: A first-principles study [J].
Bevillon, E. ;
Colombier, J. P. ;
Recoules, V. ;
Stoian, R. .
PHYSICAL REVIEW B, 2014, 89 (11)
[4]   Laser-Induced Periodic Surface Structures-A Scientific Evergreen [J].
Bonse, Joern ;
Hoehm, Sandra ;
Kirner, Sabrina V. ;
Rosenfeld, Arkadi ;
Krueger, Joerg .
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2017, 23 (03) :109-123
[5]   Evolution of ac Conductivity in Nonequilibrium Warm Dense Gold [J].
Chen, Z. ;
Holst, B. ;
Kirkwood, S. E. ;
Sametoglu, V. ;
Reid, M. ;
Tsui, Y. Y. ;
Recoules, V. ;
Ng, A. .
PHYSICAL REVIEW LETTERS, 2013, 110 (13)
[6]   Transient optical response of ultrafast nonequilibrium excited metals: Effects of electron-electron contribution to collisional absorption [J].
Colombier, J. P. ;
Combis, P. ;
Audouard, E. ;
Stoian, R. .
PHYSICAL REVIEW E, 2008, 77 (03)
[7]   Electrical conductivity for warm, dense aluminum plasmas and liquids [J].
Desjarlais, MP ;
Kress, JD ;
Collins, LA .
PHYSICAL REVIEW E, 2002, 66 (02)
[8]   Controlled nanostructrures formation by ultra fast laser pulses for color marking [J].
Dusser, B. ;
Sagan, Z. ;
Soder, H. ;
Faure, N. ;
Colombier, J. P. ;
Jourlin, M. ;
Audouard, E. .
OPTICS EXPRESS, 2010, 18 (03) :2913-2924
[9]   Hydrodynamic simulation of subpicosecond laser interaction with solid-density matter [J].
Eidmann, K ;
Meyer-ter-Vehn, J ;
Schlegel, T ;
Hüller, S .
PHYSICAL REVIEW E, 2000, 62 (01) :1202-1214
[10]   Interband and intraband (Drude) contributions to femtosecond laser absorption in aluminum [J].
Fisher, D ;
Fraenkel, M ;
Henis, Z ;
Moshe, E ;
Eliezer, S .
PHYSICAL REVIEW E, 2002, 65 (01)