期刊
SENSORS
卷 22, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/s22030933
关键词
terahertz detector; leakage currents; plateau-like effect; responsivity; broadband detection
资金
- tge National Key R&D Program of China [2018YFE0204000]
- National Natural Science Foundation of China [61971395]
In this study, three types of terahertz detectors were fabricated to analyze the plateau-like effect, with different leakage currents. The results showed that the plateau effect became more apparent as the leakage current decreased. The device with the lowest leakage current exhibited high responsivity and low noise equivalent power, and it could be used for broadband detection.
In this study, we fabricated three kinds of terahertz detectors with different leakage currents to analyze the plateau-like effect. The results indicate that the platform becomes increasingly apparent with the decrease in the leakage current. The fabricated device with the lowest leakage current shows a responsivity of 4.9 kV/W and noise equivalent power (NEP) of 72 pW/ root Hz. Further, it can be used for broadband detection between 215 GHz and 232 GHz with a voltage responsivity of more than 3.4 kV/W, and the response time can be up to 8 ns. Overall, the proposed device exhibits high sensitivity, large modulation frequency, and fast response, which indicates its excellent potential for detection and imaging applications in the THz range, including the detection of the 220 GHz atmospheric window.
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