Experimental study of the time-resolved reflectivity of chromium film
Chinese Optics Letters, Vol. 7, Issue 7, pp. 653-655 (2009)
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Abstract
The transient time-resolved reflectivity of chromium film is studied by femtosecond pump-probe technique with a 70-fs laser. Experimental results show that the reflectivity change increases with the power of the pump laser. The fast decrease of the reflectivity occurs between 0-200 fs which is mainly due to the electron-electron interaction. Subsequencely, the slower recovery of the reflectivity between 200-900 fs is mainly due to the electron-phonon coupling process. The reflectivity after 900 fs rises little to a near-constant value for the thermal equilibrium of the system. The experimental results can be explained properly with numerical simulation of the two-temperature model. It is helpful for understanding of the electron ultrafast dynamics in chromium film.
© 2009 Chinese Optics Letters
OCIS Codes
(310.6860) Thin films : Thin films, optical properties
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7160) Ultrafast optics : Ultrafast technology
Citation
Tengfei Wu, Changhe Zhou, Enwen Dai, and Jin Xie, "Experimental study of the time-resolved reflectivity of chromium film," Chin. Opt. Lett. 7, 653-655 (2009)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-7-7-653
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