Electron beam driven modulation in THz range

Summary form only given. Resonance interactions between electron beam (EB) and optical wave (OB) within vacuum channel having grooved/flat dielectric walls were initially studied in laser accelerator project, and effective energy´s transferring EB-OB had been demonstrated. EB-OB transferring in near-surface interaction region is now actively researched for the electromagnetic fields´ generation/amplification in THz band, both for Cherenkov scheme having dielectric waveguiding surface and Smith-Purcell radiating scheme, which uses conductive metallic grating. Recently it was proposed the idea to implement additional means in transferring scheme for driving the electrons´ presence into interaction region and this way to perform an amplitude modulation of the OB passing through. Achievable rate of modulation is of order 5% from the optical frequency, while applied driving voltage is of order 1 V. The newest research for performing of such modulation is presented. The realization of small size integrated structure for THz-generation/modulation/mixing by today´s MEMS technological processes is also discussed.