Optically driven field emission array for THz amplifiers

Author

Guiset, P. ; Combrie, S. ; Antoni, T. ; Carras, M. ; De Rossi, A. ; Schnell, J.-P. ; Legagneux, P.

Author_Institution

Thales Res. & Technol., Palaiseau, France

fYear

2009

fDate

28-30 April 2009

Firstpage

325

Lastpage

326

Abstract

We present the first steps for the validation of a field emission array (FEA) adapted to the modulation of electron beams at THz frequencies. This specific cathode relies on the coupling of an infrared dual-frequency laser (Deltaf~1THz) with a field emitter array composed of Multi-Wall Carbon Nanotubes. Thanks to the pre-modulation of the electronic beam, increased powers are expected for the Traveling Wave Tube (TWT) configuration. To maximize the coupling efficiency, a 1D metallic grating is used to localized and magnify the incident energy laser beam around each field emitter. Numerical optimization as well as the experimental validation of the grating performances are presented.

Keywords

carbon nanotubes; cathodes; electron field emission; submillimetre wave amplifiers; travelling wave amplifiers; field emitter array; infrared dual-frequency laser; multiwall carbon nanotubes; optically driven field emission array; terahertz amplifiers; traveling wave tube; Electron optics; Field emitter arrays; Gratings; Laser beams; Optical amplifiers; Optical arrays; Optical coupling; Optical modulation; Semiconductor optical amplifiers; Stimulated emission; carbon nanotube; field emission; grating; surface wave; terahertz;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2009. IVEC '09. IEEE International

Conference_Location

Rome

Print_ISBN

978-1-4244-3500-5

Electronic_ISBN

978-1-4244-3501-2

Type

conf

DOI

10.1109/IVELEC.2009.5193414

Filename

5193414