title: Switching the acceleration direction of Airy beams by a nonlinear optical process.
abstract: We present experimental control of the acceleration direction of Airy beams generated by nonlinear three-wave mixing processes in an asymmetrically poled nonlinear photonic crystal. Changing the crystal temperature enabled us to switch the phase matching condition between second-harmonic generation and difference-frequency generation in the same nonlinear crystal and thereby to change the acceleration direction and the wavelength of the output Airy beam. All-optical control of the acceleration direction can be also realized at a fixed crystal temperature by using a tunable pump source and selecting the proper crystal poling period.
authors.affiliation: Department of Physical Electronics, Fleischman Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel. idodolev@post.tau.ac.il
authors.forename: Ido
authors.initials: I
authors.lastname: Dolev
authors.forename: Tal
authors.initials: T
authors.lastname: Ellenbogen
authors.forename: Ady
authors.initials: A
authors.lastname: Arie