Volume 153, 2011

Optical manipulation of coherent phonons in superconducting YBa2Cu3O7−δ thin films

Abstract

The coherent phonons of YBa2Cu3O7−δ are believed to be strongly coupled to its superconductivity. Controlling the phonons below its transition temperature, therefore, may serve as a promising scheme of the control of superconductivity. Here we demonstrate optical manipulation of the Ba–O and Cu–O vibrations in a thin-film YBa2Cu3O7−δ below its transition temperature using a pair of femtosecond laser pulses. The interpulse delay is tuned to integral and half-integral multiples of the oscillation period of a specific phonon mode (Ba–O or Cu–O vibration) to enhance and suppress its amplitude, respectively.

Article information

Article type
Paper
Submitted
18 Apr 2011
Accepted
24 May 2011
First published
19 Aug 2011

Faraday Discuss., 2011,153, 375-382

Optical manipulation of coherent phonons in superconducting YBa2Cu3O7−δ thin films

Y. Okano, H. Katsuki, Y. Nakagawa, H. Takahashi, K. G. Nakamura and K. Ohmori, Faraday Discuss., 2011, 153, 375 DOI: 10.1039/C1FD00070E

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