中国激光, 2018, 45 (8): 0814002, 网络出版: 2018-08-11
蝶形天线增强的共振隧穿二极管太赫兹探测器研究 
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Research of Terahertz Detector Based on Resonant Tunneling Diode Enhanced by Bowtie Antenna
光学器件 探测器 太赫兹 蝶形天线 共振隧穿二极管 optical devices detectors terahertz bowtie antenna resonant tunneling diode
摘要
采用分子束外延技术制备了基于共振隧穿二极管的探测器样品。为提高探测响应度，探测器采用蝶形天线增强太赫兹电场强度，并以0.2 THz入射频率为参考对天线结构进行设计。测试采用输出功率为20 mW的太赫兹源，室温下在有无太赫兹波辐照时分别进行电流-电压(I-V)测试，峰值电压为1.398 V。对比最大电流值之差，计算得到探测器响应度为20 mA·W-1，噪声等效功率为15 nW·Hz-0.5，并通过测量探测器对不同角度入射太赫兹波的响应，验证了天线对太赫兹电场的增强作用。
Abstract
Detector samples based on resonant tunneling diode (RTD) are fabricated by molecular beam epitaxy. In order to improve the detection responsivity, the detector uses bowtie antenna to enhance the terahertz electric field intensity, in which the antenna structure is designed with reference to 0.2 THz incident frequency. The terahertz source with an output power of 20 mW is used for testing. Current-voltage (I-V) test is performed with and without THz irradiation at room temperature, and the peak voltage is 1.398 V. The difference between the maximum current values is tested, the detector responsivity is calculated to be of 20 mA·W-1 and the noise equivalent power is 15 nW·Hz-0.5. The response of the detector to the terahertz wave in different directions of incidence is measured, and the enhancement of the antenna on terahertz electric field is verified.
李金伦, 崔少辉, 张振伟, 倪海桥, 牛智川. 蝶形天线增强的共振隧穿二极管太赫兹探测器研究[J]. 中国激光, 2018, 45(8): 0814002. Li Jinlun, Cui Shaohui, Zhang Zhenwei, Ni Haiqiao, Niu Zhichuan. Research of Terahertz Detector Based on Resonant Tunneling Diode Enhanced by Bowtie Antenna[J]. Chinese Journal of Lasers, 2018, 45(8): 0814002.
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