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Sensitivity of a plasmonic detector is enhanced by integrating a broadband log-periodic antenna with a two-dimensional plasma cavity that is defined by source, drain, and multiple gates of a GaAs/AlGaAs high electron mobility transistor. Both narrow-band terahertz detection and a rich harmonic spectrum are evident. With a bolometric sensor in the channel, we report responsivity, on resonance at 235–240 GHz and at 20 K, of up to 7 kV/W and a noise equivalent power of
Published in:
Applied Physics Letters
(Volume:97
,
Issue:
19
)
Date of Publication: Nov 2010
- Page(s):
- 193507 - 193507-3
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.3513339
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 15 November 2010
- Issue Date :
- Nov 2010
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