Concept of a photon spatial switch based on an off-axis zone plate: experimental confirmation in the millimeter waves range

We present results of the experimental verification a concept previously proposed all-optical wavelength-selective multichannel switch based on an off-axis Wood zone plate in millimeter waveband without use micromechanical devices or non-linear materials. A laboratory prototype such device is considered and its main parameters are discussed. It shown that optical isolation switched channels for can reach 15 dB at frequency difference 25 GHz range 93 – 136 GHz.