Due to the rapid growth of the biomedical and the security applications, the interest in the development of compact and flexible sub-mm/THz radiation sources has grown significantly. In this paper we propose a novel source design to address this need. Taking the advantage of the Photonic Crystal (PC) structure, a metallic defected PC, with no axial discontinuities, was designed as a Slow Wave Structure (SWS). This SWS was used in a high power Cerenkov-transition based oscillator/amplifier working in sub-mm/THz frequency regime. The SWS allows electron beams to travel axially in it, facilitating the beam-wave interaction required for the desired signal generation. Two coaxial transitions are used as input and output for the proposed device. The analysis of the proposed device was done using a combined Finite Difference Time Domain (FDTD) / Particle In Cell (PIC) simulation. Using the FDTD thin wire model, coaxial transitions were modeled to feed/extract the input/generated signals. To show the potential of the proposed device, two design examples; one for the amplifier and the other for the oscillator, are presented.

Date Published: 27 March 2013
PDF: 7 pages
Proc. SPIE 8624, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VI, 862408 (27 March 2013); doi: 10.1117/12.2002069

Published in SPIE Proceedings Vol. 8624:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VI
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)