Research on terahertz radiation peak control of photoconductive antenna

Xiong Zhonggang; Deng Hu; Xiong Liang; Yang Jieping; Shang Liping

doi:10.11884/HPLPB202032.190302

Volume 32 Issue 3

Feb. 2020

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Article Navigation > High Power Laser and Particle Beams > 2020 > 32(3): 033102

Xiong Zhonggang, Deng Hu, Xiong Liang, et al. Research on terahertz radiation peak control of photoconductive antenna[J]. High Power Laser and Particle Beams, 2020, 32: 033102. doi: 10.11884/HPLPB202032.190302

Citation:

Xiong Zhonggang, Deng Hu, Xiong Liang, et al. Research on terahertz radiation peak control of photoconductive antenna[J]. High Power Laser and Particle Beams, 2020, 32: 033102. doi: 10.11884/HPLPB202032.190302

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Research on terahertz radiation peak control of photoconductive antenna

doi: 10.11884/HPLPB202032.190302

1.
School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China
2.
School of Mechanical Engineering, Guilin University of Aerospace Technology, Guilin 541004, China

Received Date: 2019-08-16
Rev Recd Date: 2019-12-27
Publish Date: 2020-02-10

Abstract

Abstract

This paper studies the interaction effect between the micro-structure photoconductive antenna (PCA) and femtosecond laser, the control of radiated terahertz (THz) wave, and the radiation regulation mechanism of the THz wave for the photoconductive antenna (PCA). The Drude-Lorentz theory model is used to solve the photocurrent density, which is then iterated to the excitation grid by FDTD method. And then the time-varying electromagnetic fields is solved by Maxwell’s equations. The radiated THz wave from the near field to far field in the multi-layer medium is got through the Green's Function of transmission line, and the relationship between the photocurrent and impedance of the radiation is established. At the same time, the relationship between the photocurrent and the magnetic resonance model is also established. The control mechanism of THz wave radiation from micro-structure S-shaped PCA is analyzed by simulation. The results show that the radiation impedance of the equivalent model is changed after split ring resonator (SRR) is introduced into the H-shaped PCA. Meanwhile, it is known that the coupling effect exists when the coupling coefficient is not zero. With the increasing of the coupling coefficient, and the radiation intensity of the resonance frequency peak increases and shifts. The adjusting range of the center frequency between 0.50−0.80 THz, the frequency modulation degree is 75%, and the peak radiation efficiency increases by 70% after simulating the S-shaped PCA. This work lays an important foundation for the design of THz wave resonance center frequency range and structure of high-power PCA.
- THz wave,
- photoconductive antenna,
- Drude-Lorentz model,
- electromagnetic resonance mode,
- radiation peak

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References(19)

References

[1]	Zhang J, Tuo M, Liang M, et al. Contribution assessment of antenna structure and in-gap photocurrent in terahertz radiation of photoconductive antenna[J]. Journal of Applied Physics, 2018, 124: 053107. doi: 10.1063/1.5038341
[2]	Nissiyah G J, Madhan M G. Graphene-based photoconductive antenna structures for directional terahertz emission[J]. Plasmonics, 2019, 14(4): 891-900. doi: 10.1007/s11468-018-0871-7
[3]	Bowman T, El-Shenawee M. Nondestructive imaging of packaged microelectronics using pulsed terahertz technology[J]. Int Symp Microelectron, 2017(1): 709-714.
[4]	Cheon H, Yang H, Lee S, et al. Terahertz molecular resonance of cancer DNA[J]. Scientific Reports, 2016, 6(1): 37103. doi: 10.1038/srep37103
[5]	Davies A G, Burnett A D, Fan W, et al. Terahertz spectroscopy of explosives and drugs[J]. Materials Today, 2008, 11(3): 18-26. doi: 10.1016/S1369-7021(08)70016-6
[6]	Gowen A A, O’Sullivan C, O’Donnell C P. Terahertz time domain spectroscopy and imaging: Emerging techniques for food process monitoring and quality control[J]. Trends in Food Science & Technology, 2012, 25(1): 40-46.
[7]	O’Hara J F, Chen H T, Taylor A J, et al. Split-ring resonator enhanced terahertz antenna[J]. Nonlinear Optics: Materials, Fundamentals and Applications, 2007, TuB2.
[8]	Takano K, Chiyoda Y, Nishida T, et al. Optical switching of terahertz radiation from meta-atom-loaded photoconductive antennas[J]. Applied Physics Letters, 2011, 99: 161114. doi: 10.1063/1.3654156
[9]	Miyamaru F, Saito Y, Takeda M W, et al. Emission of terahertz radiations from fractal antennas[J]. Applied Physics Letters, 2009, 95: 221111. doi: 10.1063/1.3271181
[10]	Zhisheng Piao M T A K. Carrier dynamics and terahertz radiation in photoconductive antennas[J]. Japanese Journal of Applied Physics, 2000, 39(96): 96-100.
[11]	Lee Y S. Principles of terahertz science and technology[M]. New York: Springer Science & Business Media, 2009.
[12]	Ma C, Yang L, Dong C, et al. An experimental study on LT-GaAs photoconductive antenna breakdown mechanism[J]. IEEE Trans Electron Devices, 2018, 65(3): 1043-1047. doi: 10.1109/TED.2018.2790920
[13]	Moreno E, Sohrabi R, Klochok G, et al. Vertical versus planar pulsed photoconductive antennas that emit in the terahertz regime[J]. Optik, 2018, 166: 257-269. doi: 10.1016/j.ijleo.2018.03.096
[14]	Malhotra I, Thakur P, Pandit S, et al. Analytical framework of small-gap photoconductive dipole antenna using equivalent circuit model[J]. Optical and Quantum Electronics, 2017, 49(10).
[15]	Prajapati J, Bharadwaj M, Chatterjee A, et al. Circuit modeling and performance analysis of photoconductive antenna[J]. Optics Communications, 2017, 394: 69-79. doi: 10.1016/j.optcom.2017.03.004
[16]	Castañeda-Uribe O A, Criollo C A, Winnerl S, et al. Comparative study of equivalent circuit models for photoconductive antennas[J]. Optics Express, 2018, 26(22): 29017. doi: 10.1364/OE.26.029017
[17]	Liang H, Shi S, Ma L. Coupled-mode theory of nonparallel optical waveguides[J]. Journal of Lightwave Technology, 2007, 25(8): 2233-2235. doi: 10.1109/JLT.2007.899783
[18]	Torkaman P, Darbari S, Mohammad-Zamani M J. Design and simulation of a piezotronic GaN-based pulsed THz emitter[J]. Journal of Lightwave Technology, 2018, 36(17): 3645-3651. doi: 10.1109/JLT.2018.2844219
[19]	Khorshidi M, Dadashzadeh G. Dielectric structure with periodic strips for increasing radiation power of photoconductive antennas: Theoretical analysis[J]. Journal of Infrared, Millimeter, and Terahertz Waves, 2017, 38(5): 609-629. doi: 10.1007/s10762-016-0354-x