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

• 作者: RogerA.Lewis 吕利 吴东岷 孙云飞 孙建东 秦华 蔡勇
• 来源期刊: 中国物理B（英文版）
• 关键词: terahertz detector terahertz antenna near-field probe high electron mobility transistor
• 年，卷（期）: 2015,（2）
• 页码范围: 028504-1-028504-5
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/2/028504

摘要

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.