1.
Opt Lett
; 30(15): 2004-6, 2005 Aug 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-16092247
RESUMEN
By using a sodium atomic vapor we have observed a honeycomb-type multiple-diffraction pattern that was due to a grating induced optically by three noncollinear bichromatic excitation beams. In particular, when the two incident frequencies satisfy the two-photon resonance condition and the atomic density is high, the diffraction is enhanced by electromagnetically induced transparency, and strong Stokes and anti-Stokes components are generated in well-defined directions.