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4 May 2007 Carbon-nanotube field-emitter driven compact frequency-scanning THz source
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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.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. J. Papadakis, A. H. Monica, J. Yu, J. A. Miragliotta, R. Osiander, T. Antonsen, and G. Nusinovich "Carbon-nanotube field-emitter driven compact frequency-scanning THz source", Proc. SPIE 6549, Terahertz for Military and Security Applications V, 65490N (4 May 2007);

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