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Four-wave mixing with self-phase matching due to collective atomic recoil

Robb, G.R.M. and McNeil, B.W.J. (2005) Four-wave mixing with self-phase matching due to collective atomic recoil. Physical Review Letters, 94 (2). 023901-1. ISSN 0031-9007

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    Abstract

    We describe a method for nondegenerate four-wave-mixing in a cold sample of four-level atoms. An integral part of the four-wave-mixing process is a collective instability which spontaneously generates a periodic density modulation in the cold atomic sample with a period equal to half of the wavelength of the generated high-frequency optical field. Because of the generation of this density modulation, phase matching between the pump and scattered fields is not a necessary initial condition for this wave-mixing process to occur; rather the density modulation acts to 'self-phase match' the fields during the course of the wave-mixing process. We describe a one-dimensional model of this process, and suggest a proof-of-principle experiment which would involve pumping a sample of cold Cs atoms with three infrared pump fields to produce blue light.

    Item type: Article
    ID code: 2929
    Keywords: four-wave-mixing, atoms, waves, optics, density modulation, Optics. Light
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Mr Derek Boyle
    Date Deposited: 20 Feb 2007
    Last modified: 06 Oct 2012 07:22
    URI: http://strathprints.strath.ac.uk/id/eprint/2929

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