An electron traveling along a bare dielectric waveguide at a velocity near the phase velocity acquires a transverse momentum proportional to the photon energy. It is proposed that this momenjtum be measured. The effect is analyzed with consideration for the waveguide dispersion, radiation friction and the spurious Cerenkov radiation. Use should be made of a corrugated-wall waveguide to eliminate the Cerenkov emission and to derive the required frequency dependence of the phase velocity.
Department of Molecular Physics and Physical Measurements, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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