Unless you have two beams, it would have to AC. You'd have to keep the series capacitance low enough that a significant amount of power is conducted (which migh

Unless you have two beams, it would have to AC. You'd have to keep the series capacitance low enough that a significant amount of power is conducted (which might kill it). Remember that free space impedance is 377ohms sqrt(mu0/eps0) so non-photonic power likes to become Lambertian radiation.