title: Cooperative nonlinear grating sensitive to light intensity and photon correlation.
abstract: Utilizing dipole blockade of Rydberg excitations, we study an ensemble of stationary atoms driven into the four-level N configuration for achieving a new kind of electromagnetically induced grating in the presence of a traveling-wave and a standing-wave classical control fields. This grating shows cooperative optical nonlinearities as manifested by the sensitivity of output diffraction patterns to input light intensities (photon correlations) of a quantum probe field, promising then an essential opportunity for distinguishing weaker and stronger (bunched and anti-bunched) light fields.
authors.forename: Yi-Mou
authors.initials: YM
authors.lastname: Liu
authors.forename: Xue-Dong
authors.initials: XD
authors.lastname: Tian
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Dong
authors.initials: D
authors.lastname: Yan
authors.forename: Jin-Hui
authors.initials: JH
authors.lastname: Wu