Coherent Raman spectroscopy of YBa2Cu3O7.
We report preliminary results on the optical driving and spectroscopic detection of Raman-active features in thin films of the high-temperature superconductor YBa(2)Cu(3)O(7) in its normal phase by means of coherent Stokes and anti-Stokes Raman scattering, in a reflection geometry. Reference measurements on germanium are also reported. We observe phonon resonances which interfere coherently with a broad electronic resonance centered at zero frequency, giving rise to characteristic asymmetric spectral features. Our measurements provide a first step towards applying nonlinear optical wave-mixing spectroscopy to correlated electron systems.
1Dipartimento di Scienze Fisiche, Università di Napoli Federico II, Complesso di Monte S. Angelo, via Cintia, 80126 Napoli, Italy.
A
A
Rubano
D
D
Paparo
F
F
Miletto Granozio
U
U
Scotti di Uccio
L
L
Marrucci
D002516:Ceramics / Q000737:chemistry*; D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D012542:Scattering, Radiation; D012666:Semiconductors; D013059:Spectrum Analysis, Raman / Q000379:methods*