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In our previous work [Sun etal, Appl. Phys. Lett. 100, 013506 (2012)], we inferred the existence of localized self-mixing in an antenna-coupled field-effect terahertz detector. In this Letter, we report a quasistatic self-mixing model taking into account the localized terahertz fields and its verification by comparing the simulated results with the experimental data in a two-dimensional space of the gate voltage and the drain/source bias. The model well describes the detector characteristics: not only the magnitude, but also the polarity, of the photocurrent can be tuned. The existence of strongly localized self-mixing in such detectors is confirmed.
Published in:
Applied Physics Letters
(Volume:100
,
Issue:
17
)
Date of Publication: Apr 2012
- Page(s):
- 173513 - 173513-4
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.4705306
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 30 April 2012
- Issue Date :
- Apr 2012
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