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Proceedings Paper

Broadband photonic terahertz-wave emitter based on planar-antenna-integrated UTC-PD
Author(s): Hiroshi Ito; Toshihide Yoshimatsu; Tadao Ishibashi
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Paper Abstract

The uni-traveling-carrier photodiode (UTC-PD) is a promising device for generating continuous terahertz (THz) waves by photomixing since it simultaneously operates at very high frequencies and generates relatively high output powers. These features are due to its unique operation mode utilizing only electrons as the active carriers. To utilize the performance of the UTC-PD fully, monolithic integration of an appropriate broadband antenna is essential. We fabricated devices integrating several types of planar antennas and compared their characteristics. Although all the modules exhibited broadband output characteristics at frequencies up to 1.6 THz, the behaviors at the lower frequency side as well as their polarization characteristics were quite different. Using a device integrating a novel planar antenna, we could detect output powers at frequencies from 30 GHz to 1.6 THz with almost constant polarization. Typical detected output powers were 120 μW at 200 GHz, 17 μW at 500 GHz, and 2.9 μW at 1 THz for a photocurrent of 10 mA with a bias voltage of only -0.6 V.

Paper Details

Date Published: 24 September 2013
PDF: 10 pages
Proc. SPIE 8846, Terahertz Emitters, Receivers, and Applications IV, 88460F (24 September 2013); doi: 10.1117/12.2023009
Show Author Affiliations
Hiroshi Ito, Kitasato Univ. (Japan)
Toshihide Yoshimatsu, NTT Corp. (Japan)
Tadao Ishibashi, NTT Corp. (Japan)
NTT Electronics Corp. (Japan)

Published in SPIE Proceedings Vol. 8846:
Terahertz Emitters, Receivers, and Applications IV
Manijeh Razeghi; Alexei N. Baranov; John M. Zavada, Editor(s)

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