A micro-fabricated sheet-beam Orotron THz source

S. J. Papadakis; J. A. Hoffmann; A. H. Monica; D. Deglau; J. Yu; T. Antonsen; G. Nusinovich; R. Osiander

doi:10.1117/12.884158

13 May 2011 A micro-fabricated sheet-beam Orotron THz source

S. J. Papadakis, J. A. Hoffmann, A. H. Monica, D. Deglau, J. Yu, T. Antonsen, G. Nusinovich, R. Osiander

Proceedings Volume 8031, Micro- and Nanotechnology Sensors, Systems, and Applications III; 80310C (2011) https://doi.org/10.1117/12.884158
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

We describe the fabrication of an Orotron driven by a sheet beam of electrons. The sheet beam is generated by a carbon nanotube field emission electron gun, which is less than 2 mm in total thickness. The orotron cavity is 2 cm long and 1 cm wide, and houses a microfabricated Smith-Purcell grating which generates the THz radiation. The sheet beam is 5 μm thick and 6 mm wide, and it travels within 15 μm of the top surface of the Smith-Purcell grating for the length of the cavity. The Orotron is discretely tunable, which means that there are a number of cavity resonances that can be driven by changing the energy of the beam such that for the period of the Smith-Purcell grating the cavity is driven on one of the resonances. For this work, a target frequency of 0.5 THz, corresponding to a beam energy of 3 keV, was used.

Citation Download Citation

S. J. Papadakis, J. A. Hoffmann, A. H. Monica, D. Deglau, J. Yu, T. Antonsen, G. Nusinovich, and R. Osiander "A micro-fabricated sheet-beam Orotron THz source", Proc. SPIE 8031, Micro- and Nanotechnology Sensors, Systems, and Applications III, 80310C (13 May 2011); https://doi.org/10.1117/12.884158

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