TY - JOUR
T1 - Estimation of plasma absorption effects during pulsed laser ablation of high-critical-temperature superconductors
AU - Singh, Rajiv K.
AU - Viatella, John
PY - 1994
Y1 - 1994
N2 - During pulsed laser deposition of thin films, a significant amount of energy is coupled to the laser-generated plasma. The fraction of the energy absorbed in the plasma is a function of the incident laser wavelength, time-dependent plasma dimensions, and electron density. Due to time-varying parameters, a quantitative analysis of the plasma absorption is difficult. A method has been developed to estimate plasma absorption during deposition of thin films. In this model, the time-dependent plasma dimension is replaced by the time-dependent ablation depth, which can be easily determined. Using simulated absorption coefficient values, the ablation depth of the target as a function of energy density and laser wavelengths has been computed. These calculations have been compared with experimental results obtained from excimer laser deposition of high-Tc superconductors. Correlations between plasma absorption coefficient and incident laser photon energy have also been determined.
AB - During pulsed laser deposition of thin films, a significant amount of energy is coupled to the laser-generated plasma. The fraction of the energy absorbed in the plasma is a function of the incident laser wavelength, time-dependent plasma dimensions, and electron density. Due to time-varying parameters, a quantitative analysis of the plasma absorption is difficult. A method has been developed to estimate plasma absorption during deposition of thin films. In this model, the time-dependent plasma dimension is replaced by the time-dependent ablation depth, which can be easily determined. Using simulated absorption coefficient values, the ablation depth of the target as a function of energy density and laser wavelengths has been computed. These calculations have been compared with experimental results obtained from excimer laser deposition of high-Tc superconductors. Correlations between plasma absorption coefficient and incident laser photon energy have also been determined.
UR - http://www.scopus.com/inward/record.url?scp=0028368076&partnerID=8YFLogxK
U2 - 10.1063/1.356477
DO - 10.1063/1.356477
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AN - SCOPUS:0028368076
SN - 0021-8979
VL - 75
SP - 1204
EP - 1206
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 2
ER -