Metal evaporation under powerful optical radiation

Magnetoelastic Wave Excitation Properties of Amorphous Iron-Boron Films Prepared by RF-High Rate Sputtering

“…The value of the parameter b 1 shown in table 1 was chosen in such a way that ν e-ph correctly describes the laser absorption at room temperature T m = 300 K. The important point is that the parameter b 1 a) b) depends on the metal structure and the electron collision frequency. It increases significantly in the liquid phase with a well-marked discontinuity at the melting point [11,12]. This feature is preserved also at rough surfaces [13].…”

“…According to the principle of detailed equilibrium, the emissivity of a metal sample is equal to its absorption coefficient at the given frequency and the given incidence angle [10,11]. The emissivity E of a polished metal surface follows from the Fresnel relation:…”

“…In particular, for good conductors, where σ 0 ε 0 ω, relation (3) simplifies and reduces to the Hagen-Rubens relation [11]:…”

Physics of Plasma in Laser-Induced Breakdown Spectroscopy

“…A comparison of the crater size of the homogeneous material revealed that the thermal conductivity is an important parameter. The volume heated by laser pulse is found to depend on the thermal conductivity of the material [72]. The heating of material around the crater increased with increase in incident laser intensity, because evaporation depends mainly on the boiling point of the material at fixed pressure.…”

Infrared emissivity studies of melting thresholds and structural changes of aluminium and copper samples heated by femtosecond laser pulses

“…where n L and κ L are the real and imaginary parts of the complex refraction index at the laser frequency and R is the reflection coefficient [9]. According to the principle of detailed equilibrium, the emissivity of a metal sample is equal to its absorption coefficient at the given frequency and the given incidence angle [10,11]. The emissivity E of a polished metal surface follows from the Fresnel relation: where θ is the emission angle and the subscripts s and p indicate the wave polarization.…”