Terahertz detection module based on antenna-coupled AlGaN/GaN HEMTs

被引:0
作者
Zhu, Y. F. [1 ,2 ,3 ]
Ding, Q. F. [2 ,3 ]
Zhang, J. F. [2 ,3 ]
Shangguan, Y. [2 ,3 ]
Xiang, L. Y. [1 ,2 ,3 ]
Sun, J. D. [2 ,3 ]
Qin, H. [2 ,3 ]
机构
[1] Univ Sci & Technol China, Sch Nanotech & Nanobion, Hefei 230026, Peoples R China
[2] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Key Lab Nanodevices & Applicat, Suzhou 215123, Peoples R China
[3] Key Lab Nanodevices Jiangsu Prov, Suzhou 215123, Peoples R China
来源
EARTH AND SPACE: FROM INFRARED TO TERAHERTZ, ESIT 2022 | 2023年 / 12505卷
基金
中国国家自然科学基金;
关键词
AlGaN/GaN; terahertz; detection module; quantum cascade laser;
D O I
10.1117/12.2664533
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
To accommodate variable terahertz application situations, a compact, high-sensitivity and room-temperature terahertz detection module is designed and demonstrated. The detection module with a volume of less than 350 cm(3) integrates a quasi-optically coupled terahertz detector, complementary-metal-oxide-semiconductor-based (CMOS-based) voltage amplifier circuit and bias circuit. An antenna-coupled AlGaN/GaN high-electron-mobility transistor (HEMT) are designed to detect terahertz waves by using self-mixing mechanism. The electrical signal from the detector chip is amplified by a voltage amplifier circuit. The amplifier circuit's voltage gain can be adjusted from 100 to 700 to accommodate different requirements. The bias circuit provides bias voltage to the gate of the detector. Ability to detect both continuous and pulsed terahertz waves by the module is demonstrated. Under a coherent continuous terahertz irradiation from 0.73 to 1.13 THz, an average noise-equivalent power (NEP) of 23.6 pW/root Hz, a maximum optical responsivity of 1281 V/W (w/o Gain) and a minimum NEP of 15.3 pW/root Hz are achieved. Under a 4.3 THz pulsed radiation from quantum cascade laser (QCL), the module has a peak optical responsivity of 26 V/W (with Gain = 700) and a NEP of 567 nW/root Hz. The rise time of the output signal is 1.14 mu s and the fall time is 0.78 mu s when the module is operated at a maximum amplification gain of 700 and 6 kHz modulation frequency. To further enhance the sensitivity of the detection module, the design of the detector and the noise of the circuit need to be considered.
引用
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页数:6
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