High Power Laser and Particle Beams, Volume. 32, Issue 3, 033102(2020)
Research on terahertz radiation peak control of photoconductive antenna
Figures & Tables(11)
Fig. 4. Comparison of the far-field time-domain waveform of split ring resonator (SRR) structure and H-shaped antenna
Fig. 5. Comparison of the far-field frequency-domain waveform of SRR structure and H-shaped antenna
Fig. 6. Normalized antenna radiation power spectra with different coupling coefficient
Fig. 7. Radiation power spectra of different coupling strength of micro-structure PCA
Fig. 8. Time domain waveforms of s-shaped antenna with different structural parameters
Fig. 9. Radiation spectra of s-shaped antenna with different structural parameters
Table 1.
P hysical and working parameters of the numerical simulation experimentView tableView in ArticleTable 1.
P hysical and working parameters of the numerical simulation experimentparameter symbol value unit absolute temperature 300 K laser wavelength 800 nm optical absorption coefficient 10 000 cm−1 carrier relaxation time 30 fs delay time of Gaussian pulse 4 ps carrier lifetime 0.1 ps electron mobility 200 cm2·V−1·s−1 carrier recombination time 10 ps semiconductor dielectric constant 13.18 − bias voltage 60 V repetition frequency 80 MHz laser pulse width 120 fs geometric factor 3 − thickness of the substrate 20 µm
Table 2. Structure parameters for PCA and structure calculation area
View tableView in ArticleTable 2. Structure parameters for PCA and structure calculation area
parameter symbol value unit length of structure calculation area 240 µm width of structure calculation area 240 µm thickness of structure calculation area 80 µm width of antenna metal 10 µm ground thickness 5 µm length of biased lines of s-shaped antenna 250 µm separation of biased lines and microstructure of s-shaped antenna 10 µm distance between microstructure and antenna electrode 20，30，40 µm photoconductive gap 10 µm separation between the lines 50 µm
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Zhonggang Xiong, Hu Deng, Liang Xiong, Jieping Yang, Liping Shang. Research on terahertz radiation peak control of photoconductive antenna[J]. High Power Laser and Particle Beams, 2020, 32(3): 033102
Paper Information
Received: Aug. 16, 2019
Accepted: --
Published Online: Mar. 19, 2020
The Author Email: Shang Liping (shangliping@swust.edu.cn)
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