Generation and control of two-dimensional multicolored transverse arrays

Two dimensional multicolored transverse arrays have been demonstrated experimentally with pump intensities much lower than the material damage thresholds in quadratic nonlinear media based on quadratic nonlinearities. The 2D transient gratings formed could be probed with synchronized supercontinuum pulses, resulting in 2D multicolored up-converted parametric amplification. By seeding with a weak second harmonic beam, the 2D arrays could be suppressed in a controllable way.