title: Colored ultrafast acoustics: from fundamentals to applications.
abstract: The aim of this paper is to review the various laser-wavelength effects reported in the field of ultrafast acoustics (UA). First observed by chance in 1999, a wavelength change can indeed have a strong effect on the signal detected in UA. After the physical origin of the effect was clarified and from a systematic exploration we established that all the opto-acoustic mechanisms acting in UA are influenced by the laser-wavelength. From that we suggested original applications of UA to fundamental and applied physics. So emerged a new field, now referred as Colored Picosecond Acoustics or APiC.
authors.affiliation: IEMN UMR 8520, Dpt ISEN, 41 Bd Vauban, 59046 Lillle Cedex, France. Electronic address: arnaud.devos@isen.fr.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Devos
keywords: Color; Hypersound; Phonon; Picosecond; Wavelength