title: Transverse instabilities in photorefractive counterpropagating two-wave mixing.
abstract: Threshold analysis for transverse instabilities in photorefractive counterpropagating two-wave mixing through reflection gratings is performed. A numerical algorithm for the treatment of wave equations in this geometry is developed, displaying the emergence of running transverse waves. They appear above a threshold in the applied electric field, and their transverse wave number and oscillation frequency agree well with the values predicted by stability analysis.
authors.forename: O
authors.initials: O
authors.lastname: Sandfuchs
authors.forename: J
authors.initials: J
authors.lastname: Leonardy
authors.forename: F
authors.initials: F
authors.lastname: Kaiser
authors.forename: M R
authors.initials: MR
authors.lastname: Beli