Journal of Infrared, Millimeter, and Terahertz Waves

, Volume 30, Issue 12, pp 1338–1350

Carbon Nanotube Bundle Array Cold Cathodes for THz Vacuum Tube Sources

Authors

    • Jet Propulsion LaboratoryCalifornia Institute of Technology
  • Risaku Toda
    • Jet Propulsion LaboratoryCalifornia Institute of Technology
  • Robert H. Lin
    • Jet Propulsion LaboratoryCalifornia Institute of Technology
  • Anna Liao
    • Jet Propulsion LaboratoryCalifornia Institute of Technology
  • Michael J. Bronikowski
    • Jet Propulsion LaboratoryCalifornia Institute of Technology
    • Atomate Corporation
  • Peter H. Siegel
    • Jet Propulsion LaboratoryCalifornia Institute of Technology
    • Beckman Institute, California Institute of Technology
Article

DOI: 10.1007/s10762-009-9547-x

Cite this article as:
Manohara, H.M., Toda, R., Lin, R.H. et al. J Infrared Milli Terahz Waves (2009) 30: 1338. doi:10.1007/s10762-009-9547-x

Abstract

We present high performance cold cathodes composed of arrays of carbon nanotube bundles that routinely produce > 15 A/cm2 at applied fields of 5 to 8 V/µm without any beam focusing. They have exhibited robust operation in poor vacuums of 10-6 to 10-4 Torr- a typically achievable range inside hermetically sealed microcavities. A new double-SOI process was developed to monolithically integrate a gate and additional beam tailoring electrodes. The ability to design the electrodes for specific requirements makes carbon nanotube field emission sources extremely flexible. The lifetime of these cathodes is found to be affected by two effects: a gradual decay of emission due to anode sputtering, and catastrophic failure because of dislodging of CNT bundles at high fields ( > 10 V/µm).

Keywords

Field emission Carbon nanotube CNTs Nanoklystron Vacuum tube High frequency sources

Copyright information

© US Government 2009