High-order photonic bandgap reflex klystron using carbon nanotube multi-beam cathode

Jang K.-H., Park S.H., Lee K., Park G.-S., Jeong Y.U.
Electronics Letters, 48(12), 707(2012)
DOI: 10.1049/el.2012.0976

Abstract

The oscillation of a high-order mode TM 330 is observed in a photonic bandgap multi-beam reflex klystron using nine electron beams generated from a carbon nanotube cathode. One side of a conventional metal cavity was replaced with a dielectric photonic crystal lattice to form a hybrid photonic-bandgap resonator, which uses lattice bandgap effects, resulting in a more uniform field of a higher-order mode, as well as the exclusion of some conventional-cavity-type modes, thereby reducing mode competition. The high-order and multi-beam concepts would be applicable to a terahertz radiation source when the device is micromachined. © 2012 The Institution of Engineering and Technology.