Ultrashort Laser Pulse Heating of Nanoparticles: Comparison of Theoretical Approaches

Table 1

Input parameters used for simulations in both models.

Parameters	Magnitude and units	Reference
Laser pulse shape	𝑓(𝑡)=exp[−(𝑎𝑡−𝑏)^2−(𝑎𝑡−𝑐)^2],𝑎,𝑏,𝑐=const
Energy density	𝐸=10^−3J/cm^2
Volume density of the gold	𝜌0=0.0193kg/cm^3	[11]
Electron heat capacity (gold)	𝐶𝑒(𝑇𝑒)=𝑎𝑇^4𝑒−𝑏𝑇^3𝑒+𝑐𝑇^2𝑒−𝑑𝑇𝑒J+𝑒,(K^2cm^3)𝑎=6.0×10^−17,𝑏=3.0×10^−12,𝑐=5.07×10^−8,𝑑=6.7589×10^−5,𝑒=7.207×10^−2,	[12]
Electron-phonon coupling constant for gold	𝛾=2.27×10^10WKcm^3	[13]
Gold specific heat	J𝐶=129Kkg
Specific heat of water	𝐶𝑤(𝑇𝑠)=𝑎(1+𝑏(𝑇𝑠J−293K)),()Kkg𝑎=4182.0,𝑏=1.016×10^−4.
Radius of gold nanoparticle	𝑟0=20nm
Absorption efficiency of gold nanoparticle	𝐾abs=4.0195(𝑟0=20and𝜆=528nm)	[2, 14]
Absorption coefficient of gold nanoparticle	𝛼=8.736×10^5cm^−1(𝑟0=20nmand𝜆=528nm)	[14]
Power exponent	𝑠=1.0
Thermal conductivity of water	𝜇0(𝑇𝑠)=𝑎(1+𝑏(𝑇𝑠−𝑇∞W)),()Kcm𝑎=0.00597,𝑏=1.78×10^−3.