中国物理B ›› 2020, Vol. 29 ›› Issue (7): 78704-078704.doi: 10.1088/1674-1056/ab8c42

所属专题: SPECIAL TOPIC —Terahertz physics

• SPECIAL TOPIC—Ultracold atom and its application in precision measurement • 上一篇    下一篇

A new nonlinear photoconductive terahertz radiation source based on photon-activated charge domain quenched mode

Wei Shi(施卫), Rujun Liu(刘如军), Chengang Dong(董陈岗), Cheng Ma(马成)   

  1. Key Laboratory of Ultrafast Photoelectric Technology and Terahertz Science in Shaanxi, Xi'an University of Technology, Xi'an 710048, China
  • 收稿日期:2020-03-27 修回日期:2020-04-16 出版日期:2020-07-05 发布日期:2020-07-05
  • 通讯作者: Wei Shi E-mail:swshi@mail.xaut.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0701005), the National Natural Science Foundation of China (Grant Nos. 61427814 and 51807161), and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2019JZ-04).

A new nonlinear photoconductive terahertz radiation source based on photon-activated charge domain quenched mode

Wei Shi(施卫), Rujun Liu(刘如军), Chengang Dong(董陈岗), Cheng Ma(马成)   

  1. Key Laboratory of Ultrafast Photoelectric Technology and Terahertz Science in Shaanxi, Xi'an University of Technology, Xi'an 710048, China
  • Received:2020-03-27 Revised:2020-04-16 Online:2020-07-05 Published:2020-07-05
  • Contact: Wei Shi E-mail:swshi@mail.xaut.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0701005), the National Natural Science Foundation of China (Grant Nos. 61427814 and 51807161), and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2019JZ-04).

摘要: We present a high-performance terahertz (THz) radiation source based on the photon-activated charge domain (PACD) quenched mode of GaAs photoconductive antennas (GaAs PCA). The THz radiation characteristics of the GaAs PCA under different operating modes are studied. Compared with the linear mode, the intensity of THz wave radiated by the GaAs PCA can be greatly enhanced due to the avalanche multiplication effect of carriers in the PACD quenched mode. The results show that when the carrier multiplication ratio is 16.92, the peak-to-peak value of THz field radiated in the PACD quenched mode increases by as much as about 4.19 times compared to the maximum values in the linear mode.

关键词: photoconductive antenna, terahertz time-domain spectroscopy, photon-activated charge domain quenched mode

Abstract: We present a high-performance terahertz (THz) radiation source based on the photon-activated charge domain (PACD) quenched mode of GaAs photoconductive antennas (GaAs PCA). The THz radiation characteristics of the GaAs PCA under different operating modes are studied. Compared with the linear mode, the intensity of THz wave radiated by the GaAs PCA can be greatly enhanced due to the avalanche multiplication effect of carriers in the PACD quenched mode. The results show that when the carrier multiplication ratio is 16.92, the peak-to-peak value of THz field radiated in the PACD quenched mode increases by as much as about 4.19 times compared to the maximum values in the linear mode.

Key words: photoconductive antenna, terahertz time-domain spectroscopy, photon-activated charge domain quenched mode

中图分类号:  (Ultrafast spectroscopy (<1 psec))

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