Mapping an on-chip terahertz antenna by a scanning near-field probe and a fixed field-effect transistor

doi:10.1088/1674-1056/24/2/028504

Abstract In the terahertz (THz) regime, the active region for a solid-state detector usually needs to be implemented accurately in the near-field region of an on-chip antenna. Mapping of the near-field strength could allow for rapid verification and optimization of new antenna/detector designs. Here, we report a proof-of-concept experiment in which the field mapping is realized by a scanning metallic probe and a fixed AlGaN/GaN field-effect transistor. Experiment results agree well with the electromagnetic-wave simulations. The results also suggest a field-effect THz detector combined with a probe tip could serve as a high sensitivity THz near-field sensor.

Keywords: terahertz detector terahertz antenna near-field probe high electron mobility transistor

Received: 16 August 2014
Revised: 23 September 2014
Accepted manuscript online:

PACS:	85.60.Gz	(Photodetectors (including infrared and CCD detectors))
	72.80.Ey	(III-V and II-VI semiconductors)
	87.50.U-
	87.64.mt	(Near-field scanning)

Fund: Project partially supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KJCX2-EW-705), China Postdoctoral Science Foundation (Grant No. 2014M551678), Jiangsu Planned Projects for Postdoctoral Research Funds (Grant No. 1301054B), Instrument Developing Project of the Chinese Academy of Sciences (Grant No. YZ201152), the National Natural Science Foundation of China (Grant No. 61271157), Suzhou Science and Technology Project (Grant No. ZXG2012024), and the Chinese Academy of Sciences Visiting Professorship for Senior International Scientists (Grant No. 2010T2J07).

Corresponding Authors: Sun Jian-Dong, Qin Hua
E-mail: dsun2008@sinano.ac.cn;hqin2007@sinano.ac.cn

Cite this article:

Lü Li (吕利), Sun Jian-Dong (孙建东), Roger A. Lewis, Sun Yun-Fei (孙云飞), Wu Dong-Min (吴东岷), Cai Yong (蔡勇), Qin Hua (秦华) Mapping an on-chip terahertz antenna by a scanning near-field probe and a fixed field-effect transistor 2015 Chin. Phys. B 24 028504

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Mapping an on-chip terahertz antenna by a scanning near-field probe and a fixed field-effect transistor

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