研究目的
To study the electron temperature variation in metals through interaction with femtosecond laser pulses by extending the classical Anisimov’s two temperature model via the 3D telegraph Zhukovsky equation.
研究成果
The study concludes that using state-of-the-art mathematics, the two temperature model (TTM) can provide pertinent thermal information in ultra-short laser pulse–metal interaction. The lower the g/K factor, the higher the electron temperature, and the lower the relaxation time, the lower the electron temperature. The model is highly performing and can be easily used by researchers as the laser–metal interaction is treated in a classical way.
研究不足
The model is limited to low laser fluences and the first pulse interaction with metals.
1：Experimental Design and Method Selection:
The study extends the classical Anisimov’s two temperature model via the 3D telegraph Zhukovsky equation to describe the thermal field interaction of femtosecond laser radiation with metals during the first pulse.
2：Sample Selection and Data Sources:
The interaction of a top-hat fs pulse generated by a Ti–sapphire laser source with an Au target was simulated.
3：List of Experimental Equipment and Materials:
Ti–sapphire laser source (λ = 760 nm, tp = 100 fs), Au target (δ = 20 nm, δb = 100 nm), K = 315 W/mK, ci = 2.1 × 104 J/(m3K), and g = 2.1 × 1016 W/m3K.
4：1 × 104 J/(m3K), and g = 1 × 1016 W/m3K.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The electron temperature was estimated based upon the solution of the extended two temperature model.
5：Data Analysis Methods:
The thermal field was analyzed using computational plots of electron thermal fields during the first laser pulse interaction with a gold surface.
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