title: Coherent Brillouin spectroscopy in a strongly scattering liquid by picosecond ultrasonics.
abstract: In a modification of a picosecond ultrasonic technique, a short acoustic pulse is launched into a liquid sample by a laser pulse absorbed in a semitransparent transducer film and is detected via coherent Brillouin scattering of a time-delayed probe pulse. With both excitation and probing performed from the transducer side, the arrangement is suitable for in vivo study of biological tissues. The signal is collected from a micrometer-thick layer next to the transducer and is not affected by the diffuse scattering of probe light deeper in the sample. The setup, utilizing a 33 nm thick single crystal SrRuO(3) transducer film, is tested on a full fat milk sample, with 11 GHz acoustic frequency recorded.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. maznev@mit.edu
authors.forename: A A
authors.initials: AA
authors.lastname: Maznev
authors.forename: K J
authors.initials: KJ
authors.lastname: Manke
authors.forename: C
authors.initials: C
authors.lastname: Klieber
authors.forename: Keith A
authors.initials: KA
authors.lastname: Nelson
authors.forename: S H
authors.initials: SH
authors.lastname: Baek
authors.forename: C B
authors.initials: CB
authors.lastname: Eom