Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3687698
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Funding
- University of Buffalo NSF-NIRT THz Collaboratory [ECS0609146]
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- U.S. Air Force Office of Scientific Research, Arlington, VA [FA9550-10-C-0172]
- Physical Sciences Inc. Andover, MA [FI011090528]
- Humboldt foundation
- NSF MRSEC [DMR-0520415]
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A multi-gate high electron mobility transistor coupled to a log-periodic antenna was engineered to detect sub-terahertz radiation through resonant excitation of plasmon modes in the channel. The device was integrated with a silicon hyper-hemispherical lens in order to enhance radiation collection and eliminate parasitic substrate modes. The continuous detector response spectrum from 185 GHz to 380 GHz indicates the presence of distinct collective plasmonic cavity modes resulting from the quantization of the plasmon wavevector. In a bolometric detection mode, a noise equivalent power of less than 50 pW/Hz(1/2) and a responsivity exceeding 100 kV/W have been measured at 11.5 K. (C) 2012 American Institute of Physics. [doi:10.1063/1.3687698]
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