研究目的
Investigating the origin of distorted intensity pattern sensed by a lens and antenna-coupled AlGaN/GaN-HEMT terahertz detectors.
研究成果
The study concludes that the integrated detector is sensitive to the location of the incident terahertz wave and does not reflect the intensity pattern truthfully. The s-antenna is found to be responsible for the distortion in intensity pattern. Such artefacts might be commonplace in antenna-coupled FET terahertz detectors especially when the terahertz beam is strongly focused with a dimension comparable to the antenna size.
研究不足
The study is limited by the specific antenna design and the size of the beam spot relative to the antenna size. Potential areas for optimization include new antenna designs to achieve strong asymmetry in the terahertz field distribution under the gate while maintaining a more symmetric radiation pattern for the whole antenna.
