中国物理B ›› 2015, Vol. 24 ›› Issue (2): 28504-028504.doi: 10.1088/1674-1056/24/2/028504
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
吕利a b, 孙建东a, Roger A. Lewisc, 孙云飞d, 吴东岷a d, 蔡勇a, 秦华a
Lü Li (吕利)a b, Sun Jian-Dong (孙建东)a, Roger A. Lewisc, Sun Yun-Fei (孙云飞)d, Wu Dong-Min (吴东岷)a d, Cai Yong (蔡勇)a, Qin Hua (秦华)a
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.
中图分类号: (Photodetectors (including infrared and CCD detectors))