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Four-wave mixing with self-phase matching due to collective atomic recoil.
MedLine Citation:
PMID:  15698177     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
G R M Robb; B W J McNeil
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Publication Detail:
Type:  Journal Article     Date:  2005-01-18
Journal Detail:
Title:  Physical review letters     Volume:  94     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-02-08     Completed Date:  2005-04-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  023901     Citation Subset:  -    
Affiliation:
Department of Physics, John Anderson Building, University of Strathclyde, Glasgow, G4 0NG, Scotland.
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