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Magnetoelectric directional nonreciprocity in gas-phase molecular nitrogen.
MedLine Citation:
PMID:  21668149     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We report the direct observation of the nonreciprocity of the velocity of light, induced by electric and magnetic fields. This bilinear magneto-electro-optical effect appears in crossed electric and magnetic fields perpendicular to the light wave vector, as a refractive index difference between two counterpropagating directions. Using a high finesse ring cavity, we have measured this magnetoelectric nonreciprocity in molecular nitrogen at ambient temperature and atmospheric pressure; for light polarized parallel to the magnetic field it is 2η_{∥exp⁡}(N_{2})=(4.7±1)×10^{-23}  m V^{-1} T^{-1} for λ=1064  nm, in agreement with the expected order of magnitude. Our measurement opens the way to a deeper insight into light-matter interaction beyond the electric dipole approximation. We were able to measure a nonreciprocity as small as Δn=(5±2)×10^{-18}, which makes its observation in quantum vacuum a conceivable challenge.
Authors:
B Pelle; H Bitard; G Bailly; C Robilliard
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Publication Detail:
Type:  Journal Article     Date:  2011-05-11
Journal Detail:
Title:  Physical review letters     Volume:  106     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-06-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  193003     Citation Subset:  IM    
Affiliation:
Université de Toulouse, UPS, Laboratoire Collisions Agrégats Réactivité, IRSAMC, F-31062 Toulouse, France and CNRS, UMR 5589, F-31062 Toulouse, France.
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