Atomic-level study of a thickness-dependent phase change in gold thin films heated by an ultrafast laser.
Appl Opt
; 51(24): 5946-51, 2012 Aug 20.
Article
in En
| MEDLINE
| ID: mdl-22907027
ABSTRACT
An ultrafast laser-induced phase change in gold thin films with different thicknesses has been simulated by the method of coupling the two-temperature model and the molecular dynamics, including transient optical properties. Numerical results show that the decrease of film thickness leads to faster melting in the early nonequilibrium time and a larger melting depth. Moreover, earlier occurrence and a higher rate of resolidification are observed for the thicker film. Further analysis reveals that the mechanism for the thickness-dependent phase change in the films is the fast electron thermal conduction in the nonequilibrium state.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phase Transition
/
Nanostructures
/
Lasers
Type of study:
Prognostic_studies
Language:
En
Journal:
Appl Opt
Year:
2012
Document type:
Article
Affiliation country:
China
Country of publication:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA