Photonic Crystal-Structures for THz Vacuum Electron Devices

Author

Letizia, Rosa ; Mineo, Mauro ; Paoloni, Claudio

Author_Institution

Dept. of Eng., Lancaster Univ., Lancaster, UK

Volume

62

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

178

Lastpage

183

Abstract

The technology of photonic crystals (PhCs) is investigated here to improve the performance of THz vacuum electron devices. Compared with conventional metallic waveguides, the PhC arrangement alleviates typical issues in THz vacuum electron tubes, i.e. difficult vacuum pumping process and assembling, and improves the input/output coupling. A slow-wave structure (SWS) based on a corrugated waveguide assisted by PhC lateral walls and the efficient design of a PhC coupler for sheet-beam interaction devices are demonstrated. Based on the proposed technology, a backward-wave oscillator (BWO) is designed in this paper. Cold parameters of the novel PhC SWS as well as 3-D particle-in-cell simulations of the overall BWO are investigated, obtaining more than 70-mW-peak output power at 0.650 THz for beam voltage of 11 kV and beam current of 6 mA.

Keywords

backward wave oscillators; microwave photonics; photonic crystals; slow wave structures; submillimetre wave tubes; terahertz wave devices; vacuum tubes; waveguides; 3D particle-in-cell simulations; BWO; PhC arrangement; PhC coupler design; PhC lateral walls; PhCs technology; SWS; THz vacuum electron devices; THz vacuum electron tubes; assembling; backward-wave oscillator; cold parameters; corrugated waveguide; current 6 mA; frequency 0.650 THz; input-output coupling; metallic waveguides; photonic crystal-structures; sheet-beam interaction devices; slow-wave structure; vacuum pumping process; voltage 11 kV; Couplers; Couplings; Cutoff frequency; Electromagnetic waveguides; Electron devices; Photonic band gap; Power generation; Backward-wave oscillator (BWO); THz; corrugated waveguide; photonic bandgap (PBG); photonic crystal (PhC); vacuum electron devices; vacuum electron devices.;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2014.2366639

Filename

6960824