Dipole photoconductive antennas for broadband terahertz receiver

被引：0
|
作者：
Pan Y. [1 ,2 ]
Zheng Z. [1 ]
Ding Q. [1 ]
Yao Y. [2 ]
机构：
[1] Shenzhen Institute of Terahertz Technology and Innovation, Shenzhen
[2] Laser Information Technology Research Center, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2019年 / 48卷 / 01期
关键词：
Photoconductive antenna; Terahertz; Terahertz detector; Terahertz time-domain spectroscopy;
D O I：
10.3788/IRLA201948.0125002
中图分类号：
学科分类号：
摘要：
Terahertz(THz) photoconductive antennas(PCAs) are widely used in the detection of broadband pulsed terahertz waves and are important components in THz spectroscopy and imaging systems. Due to its simple structure and ease of fabrication, the dipole photoconductive antenna is the mostly used antenna for THz receivers. The primary specification of THz antennas is the bandwidth. To study the detection bandwidth of PCAs, dipole antennas with the arm length of 10, 50 and 150μm and a bowtie antenna with the arm length of 178μm were studied theoretically and experimentally. The results showed that the detection bandwidth decreased with the increase of the antenna arm length, which is consistent with the microwave antenna theory. Further, a commercial electromagnetic field numerical software was used for simulation. The results were in good agreement with the theoretical and experimental results and the model could be able to predict the performance of actual THz PCAs. The simulation can be used to design broadband and high sensitive THz antennas by optimizing structural parameters. The use of a hyper-hemispherical silicon substrate lens on the back of the receivers was also studied. © 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
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  • [1] Tonouchi M., Cutting-edge terahertz technology, Nature Photonics, 1, 2, pp. 97-105, (2007)
  • [2] Han X., Cui H., Zhang J., Et al., Accurate and rapid extraction of optical parameters for thin plates with terahertz time-domain spectroscopy technology, Infrared and Laser Engineering, 46, 5, (2017)
  • [3] Li H., Yu C., Terahertz spectral detection in human renal tissue, Infrared and Laser Engineering, 45, 5, (2016)
  • [4] Xie Q., Yang H., Li H., Et al., Explosive identification based on terahertz time-domain spectral system, Optics and Precision Engienering, 34, 10, (2016)
  • [5] Zhang X., Sun J., Cai H., Et al., Quiet zone measurements and data processing of THz-TDS experiment system, Infrared and Laser Engineering, 45, 11, (2016)
  • [6] Burford N.M., Elshenawee M.O., Review of terahertz photoconductive antenna technology, Optical Engineering, 56, 1, (2017)
  • [7] Van Exter M., Grischkowsky D., Characterization of an optoelectronic terahertz beam system, Microwave Theory & Techniques IEEE Transactions On, 38, 11, pp. 1684-1691, (1990)
  • [8] Xu M., Li M., An X., Et al., Infrared quenching operation of non-linear GaAs photoconductive semiconductor switch for terahertz generation, Infrared and Laser Engineering, 45, 4, (2016)
  • [9] Winnerl S., Peter F., Nitsche S., Et al., Generation and detection of THz radiation with scalable antennas based on GaAs substrates with different carrier lifetimes, IEEE Journal of Selected Topics in Quantum Electronics, 14, 2, pp. 449-457, (2008)
  • [10] Dykaar D.R., Greene B.I., Federici J.F., Et al., Log-periodic antennas for pulsed terahertz radiation, Applied Physics Letters, 59, 3, pp. 262-264, (1991)
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