Conical diffraction was observed when two beams of the same or different frequencies intersect as they pass through a cell containing a transparent liquid. Light is emitted along the surfaces of cones centered in each of the two beams with an angular extent equal to twice the crossing angle between the two incident beams. The origin of this effect is attributed to a combination of modulational instability, two-beam emission, and nonlinear Bragg diffraction.
© 2006 Optical Society of America
(190.4420) Nonlinear optics : Nonlinear optics, transverse effects in
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
Original Manuscript: June 1, 2005
Manuscript Accepted: August 30, 2005
Márcio A. Alencar and Cid B. de Araújo, "Conical diffraction instability due to cross-phase modulation in Kerr media," J. Opt. Soc. Am. B 23, 302-307 (2006)