I propose an electromagnetically induced phase grating based on the giant Kerr nonlinearity of an atomic medium under electromagnetically induced transparency. The atomic phase grating behaves similarly to an ideal sinusoidal phase grating, and it is capable of producing a π phase excursion across a weak probe beam along with high transmissivity. The grating is created with arbitrarily weak fields, and diffraction efficiencies as high as 30% are predicted.
© 2010 Optical Society of America
Atomic and Molecular Physics
Original Manuscript: December 21, 2009
Revised Manuscript: February 10, 2010
Manuscript Accepted: February 19, 2010
Published: March 24, 2010
Luís E. E. de Araujo, "Electromagnetically induced phase grating," Opt. Lett. 35, 977-979 (2010)