title: Emission of photon echoes in a strongly scattering medium.
abstract: We observe the two- and three-pulse photon echo emission from a scattering powder, obtained by grinding a Pr3+:Y2SiO5 rare earth doped single crystal. We show that the collective emission is coherently constructed over several grains. A well defined atomic coherence can therefore be created between randomly placed particles. Observation of photon echo on powders as opposed to bulk materials opens the way to faster material development. More generally, time-domain resonant four-wave mixing offers an attractive approach to investigate coherent propagation in scattering media.
authors.affiliation: Chimie-Paristech, Laboratoire de Chimie de la Matière Condensée de Paris, CNRS-UMR7574, UPMC Univ Paris 06, 11 rue Pierre et Marie Curie 75005 Paris, France.
authors.forename: F
authors.initials: F
authors.lastname: Beaudoux
authors.forename: A
authors.initials: A
authors.lastname: Ferrier
authors.forename: O
authors.initials: O
authors.lastname: Guillot-Noël
authors.forename: T
authors.initials: T
authors.lastname: Chanelière
authors.forename: J-L
authors.initials: JL
authors.lastname: Le Gouët
authors.forename: Ph
authors.initials: P
authors.lastname: Goldner
mesh_terms: D003460:Crystallization; D004867:Equipment Design; D008027:Light; D008422:Materials Testing; D017785:Photons; D011208:Powders; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted; D012997:Solvents / Q000737:chemistry; D013997:Time Factors
chemical_list: D011208:Powders; D012997:Solvents