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Stimulated Excitation of an Optical Cavity by a Multibunch Electron Beam via Coherent-Diffraction-Radiation Process

2018; American Physical Society; Volume: 121; Issue: 18 Linguagem: Inglês

10.1103/physrevlett.121.184801

1092-0145

Y. Honda, Miho Shimada, Alexander Aryshev, R. Kato, Tsukasa Miyajima, T. Obina, Ryota Takai, Takashi Uchiyama, Naoto Yamamoto,

Gyrotron and Vacuum Electronics Research

With a low emittance and short-bunch electron beam at a high repetition rate realized by a superconducting linac, stimulated excitation of an optical cavity at the terahertz spectrum range is shown. The electron beam passes through small holes in the cavity mirrors without being destroyed. A sharp resonance structure which indicates wideband stimulated emission via coherent diffraction radiation is observed while scanning the round-trip length of the cavity.