Laser-plasma detection of the difference frequency of two light waves
Basov N. G. ,Vasil'ev B. I. , Grasyuk A. Z. , Losev L. L. , Meshalkin E. A.
A high-frequency component has been observed in the current flowing from a charged metal target to the plasma of an optical surface breakdown. The frequency of this current component is that at which the intensity of the light wave producing the plasma is modulated. The eifect is a laser-plasma detection of the difference frequency of two light waves.