Interference of fields with frequencies ω and 2ω in external photoelectric effect
Zel'dovich B. Ya. , Chudinov A. N.
An interference of the amplitudes of the one-photon and two-photon photoelectric effects, predicted previously, has been observed during the exposure of a photomultiplier cathode to the beam from a pulsed neodymium laser and to the second harmonic of this beam simultaneously. A specific polar asymmetry of the interference term in the photocurrent has been found.