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Proceedings Paper

Carbon-nanotube field-emitter driven compact frequency-scanning THz source
Author(s): S. J. Papadakis; A. H. Monica; J. Yu; J. A. Miragliotta; R. Osiander; T. Antonsen; G. Nusinovich
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Paper Abstract

We describe a scanning Orotron Terahertz radiation (THz) source. The operational principle is as follows: a sheet beam of electrons passes near a corrugated metal surface (Smith-Purcell grating) contained in a resonant cavity. The periodic forces on the electrons drive the cavity on its resonances in the THz regime. We describe theoretical predictions for the sheet beam parameters required and the likely performance of the device. We also describe experimental progress towards sheet-beam generation using field-emitted electrons from a carbon-nanotube array. We describe the carbon nanotube growth process and demonstrate sheet-beam current densities which exceed the predicted turn-on current density of the Orotron cavity.

Paper Details

Date Published: 4 May 2007
PDF: 9 pages
Proc. SPIE 6549, Terahertz for Military and Security Applications V, 65490N (4 May 2007); doi: 10.1117/12.722953
Show Author Affiliations
S. J. Papadakis, Johns Hopkins Univ. Applied Physics Lab. (United States)
A. H. Monica, Johns Hopkins Univ. Applied Physics Lab. (United States)
J. Yu, Univ. of Maryland, College Park (United States)
J. A. Miragliotta, Johns Hopkins Univ. Applied Physics Lab. (United States)
R. Osiander, Johns Hopkins Univ. Applied Physics Lab. (United States)
T. Antonsen, Univ. of Maryland, College Park (United States)
G. Nusinovich, Univ. of Maryland, College Park (United States)


Published in SPIE Proceedings Vol. 6549:
Terahertz for Military and Security Applications V
James O. Jensen; Hong-Liang Cui, Editor(s)

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