Thermal Lattice Field during Ultra-Short Laser Pulse Irradiation of Metal Targets: A Fokker-Planck Analytical Model

被引:2
|
作者
Anghel, Sinziana-Andreea [1 ,2 ]
Oane, Mihai [1 ]
Mihailescu, Cristian N. [1 ]
Sava, Bogdan A. [1 ,3 ]
Elisa, Mihail [4 ]
Mihailescu, Natalia [1 ]
Ticos, Dorina [1 ]
Trefilov, Alexandra M. I. [1 ]
Ristoscu, Carmen [1 ]
Filip, Ana V. [1 ]
Mihailescu, Ion N. [1 ]
机构
[1] Natl Inst Laser Plasma & Radiat Phys INFLPR, Magurele 077125, Ilfov, Romania
[2] Univ Bucharest, Fac Phys, Magurele 077125, Ilfov, Romania
[3] Univ Politehn Bucuresti, Fac Appl Chem & Mat Sci, 313 Spl Independentei, Bucharest 060042, Romania
[4] Natl Inst R&D Optoelect, INOE 2000,409 Atomistilor Str, Magurele 077125, Ilfov, Romania
关键词
two-temperature model; Fokker-Planck analytical approach; laser heating of metals; fs laser pulses; analytical simulations; beta parameter; FUNDAMENTALS;
D O I
10.3390/met13101775
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The ultrafast fs laser pulse heating of thin metal films is studied for the first time using the two-temperature model on the basis of the Fokker-Planck formalism. The incident laser radiation is multi-modal, while the electron temperature is described during the first 2 fs. The predictions are intended for use by experimentalists in optoelectronics, photonics, laser processing, electronics, and bio- and nanomedicine. The crucial role of the nano-sized spatial dimensions of the metal sample is highlighted. A significant result of this study is the interdependence between the target's size, the phonon/lattice characteristics, and the coefficient beta (the quotient of non-diffusive phenomena), which varies between zero (pure diffusive case) and one (pure non-diffusive case).
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页数:11
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