TERAHERTZ EMISSION STUDY OF FEMTOSECOND TIME-TRANSIENT NONEQUILIBRIUMSTATE IN OPTICALLY-EXCITED YBA2CU3O7-DELTA THIN-FILMS

Authors
TONOUCHI M TANI M WANG Z SAKAI K WADA N HANGYO M
Citation
M. Tonouchi et al., TERAHERTZ EMISSION STUDY OF FEMTOSECOND TIME-TRANSIENT NONEQUILIBRIUMSTATE IN OPTICALLY-EXCITED YBA2CU3O7-DELTA THIN-FILMS, JPN J A P 2, 35(12A), 1996, pp. 1578-1581
Citations number
20
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS → ACNP
Volume
35
Issue
12A
Year of publication
1996
Pages
1578 - 1581
Database
ISI
SICI code
Abstract
We observed the temperature dependence of a femtosecond time-transient photoresponse in YBa2Cu3O7-delta thin films by detecting terahertz (T Hz) emission. Ultrashort electromagnetic pulses which are referred to as THz emission were generated by ultrafast supercurrent modulation wi th femtosecond laser pulse irradiation. The transient response is disc ussed in relation to the quasiparticle dynamics of the nonequilibrium superconductor.