COHERENT OPTICAL PHONON EXCITATION BY FEMTOSECOND LASER PULSE IN YBa2Cu3O7-$\delta$ THIN FILMS

doi:10.1088/1004-423X/5/8/005

Abstract

Abstract With a correlation of nonequilibrium carriers relaxation and coherent phonons displacive excitation, the coherent optical phonon oscillations in YBa₂Cu₃O_7-$\delta$ thin films excited by femtosecond laser pulse are simulated theoretically. It is revealed that as the oxygen concentration decreases, the coherent phonon oscillations become easier to be observed due to the decrease of the local coupling between the carriers and the lattice vibrations in the CuO₂ plane.

Received: 28 June 1995
Accepted manuscript online:

PACS:	74.25.Kc	(Phonons)
	74.78.Bz
	74.72.Bk
	74.25.Gz	(Optical properties)

Cite this article:

PI FEI-PENG (皮飞鹏), LIN WEI-ZHU (林位株), MO DANG (莫党) COHERENT OPTICAL PHONON EXCITATION BY FEMTOSECOND LASER PULSE IN YBa₂Cu₃O_7-$\delta$ THIN FILMS 1996 Acta Physica Sinica (Overseas Edition) 5 601

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COHERENT OPTICAL PHONON EXCITATION BY FEMTOSECOND LASER PULSE IN YBa2Cu3O7-$\delta$ THIN FILMS

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COHERENT OPTICAL PHONON EXCITATION BY FEMTOSECOND LASER PULSE IN YBa₂Cu₃O_7-$\delta$ THIN FILMS