COHERENT OPTICAL PHONON EXCITATION BY FEMTOSECOND LASER-PULSE IN YBA2CU3O7-DELTA THIN-FILMS

Authors
PI FP LIN WZ MO D
Citation
Fp. Pi et al., COHERENT OPTICAL PHONON EXCITATION BY FEMTOSECOND LASER-PULSE IN YBA2CU3O7-DELTA THIN-FILMS, Acta physica Sinica, 5(8), 1996, pp. 601-608
Citations number
14
Categorie Soggetti
Physics
Journal title
Acta physica Sinica → ACNP
ISSN journal
10003290
Volume
5
Issue
8
Year of publication
1996
Pages
601 - 608
Database
ISI
SICI code
1000-3290(1996)5:8<601:COPEBF>2.0.ZU;2-9
Abstract
With a correlation of nonequilibrium carriers relaxation and coherent phonons displacive excitation, the coherent optical phonon oscillation s in YBa2Cu3O7-delta thin films excited by femtosecond laser pulse are simulated theoretically. It is revealed that as the oxygen concentrat ion decreases, the coherent phonon oscillations become easier to be ob served due to the decrease of the local coupling between the carriers and the lattice vibrations in the CuO2 plane.