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
Wei Shi(施卫), Rujun Liu(刘如军), Chengang Dong(董陈岗), Cheng Ma(马成)
Wei Shi(施卫), Rujun Liu(刘如军), Chengang Dong(董陈岗), Cheng Ma(马成)
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.
中图分类号: (Ultrafast spectroscopy (<1 psec))