Design of a metamaterial cavity for harmonic terahertz gyrotrons

Zi-Wen Zhang, Chao-Hai Du, Fan-Hong Li, Juan-Feng Zhu, Pu-Kun Liu, Liang Zhang, Wenlong He, HuaBi Yin, Kevin Ronald, Alan D.R. Phelps, Adrian W. Cross

Research output: Contribution to conferencePaper

Abstract

A resonant cavity is developed with a metallic photonic crystal (MPC) to reduce the magnetic field strength and suppress mode competition for a terahertz fourth-harmonic gyrotron. Due to the photonic band gap, electromagnetic waves radiated in certain directions at specified frequencies cannot propagate in the photonic crystal. The dispersion relations of MPC were numerically calculated using a finite-difference frequency-domain method. The gap map for a square lattice of metallic rods was derived from the dispersion relations as the radius of the rods varies. The map of the localized modes in the defects was plotted to illustrate the connection between the band structure and the TE modes. The MPC cavity was simulated and better performance was demonstrated in terms of mode competition compared with a circular waveguide cavity of equivalent cut-off radius at 1-THz.

Conference

Conference12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019)
Abbreviated titleUCMMT 2019
CountryUnited Kingdom
CityLondon
Period20/08/1922/08/19
Internet address

Fingerprint

cyclotron resonance devices
photonics
harmonics
cavities
crystals
rods
circular waveguides
radii
cavity resonators
field strength
electromagnetic radiation
cut-off
defects
magnetic fields

Keywords

  • harmonic operation
  • photonic crystal
  • photonic band gap
  • mode competition
  • gyrotron

Cite this

Zhang, Z-W., Du, C-H., Li, F-H., Zhu, J-F., Liu, P-K., Zhang, L., ... Cross, A. W. (2019). Design of a metamaterial cavity for harmonic terahertz gyrotrons. Paper presented at 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), London, United Kingdom.
Zhang, Zi-Wen ; Du, Chao-Hai ; Li, Fan-Hong ; Zhu, Juan-Feng ; Liu, Pu-Kun ; Zhang, Liang ; He, Wenlong ; Yin, HuaBi ; Ronald, Kevin ; Phelps, Alan D.R. ; Cross, Adrian W. / Design of a metamaterial cavity for harmonic terahertz gyrotrons. Paper presented at 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), London, United Kingdom.3 p.
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abstract = "A resonant cavity is developed with a metallic photonic crystal (MPC) to reduce the magnetic field strength and suppress mode competition for a terahertz fourth-harmonic gyrotron. Due to the photonic band gap, electromagnetic waves radiated in certain directions at specified frequencies cannot propagate in the photonic crystal. The dispersion relations of MPC were numerically calculated using a finite-difference frequency-domain method. The gap map for a square lattice of metallic rods was derived from the dispersion relations as the radius of the rods varies. The map of the localized modes in the defects was plotted to illustrate the connection between the band structure and the TE modes. The MPC cavity was simulated and better performance was demonstrated in terms of mode competition compared with a circular waveguide cavity of equivalent cut-off radius at 1-THz.",
keywords = "harmonic operation, photonic crystal, photonic band gap, mode competition, gyrotron",
author = "Zi-Wen Zhang and Chao-Hai Du and Fan-Hong Li and Juan-Feng Zhu and Pu-Kun Liu and Liang Zhang and Wenlong He and HuaBi Yin and Kevin Ronald and Phelps, {Alan D.R.} and Cross, {Adrian W.}",
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note = "12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), UCMMT 2019 ; Conference date: 20-08-2019 Through 22-08-2019",
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Zhang, Z-W, Du, C-H, Li, F-H, Zhu, J-F, Liu, P-K, Zhang, L, He, W, Yin, H, Ronald, K, Phelps, ADR & Cross, AW 2019, 'Design of a metamaterial cavity for harmonic terahertz gyrotrons' Paper presented at 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), London, United Kingdom, 20/08/19 - 22/08/19, .

Design of a metamaterial cavity for harmonic terahertz gyrotrons. / Zhang, Zi-Wen; Du, Chao-Hai; Li, Fan-Hong; Zhu, Juan-Feng; Liu, Pu-Kun; Zhang, Liang; He, Wenlong; Yin, HuaBi; Ronald, Kevin; Phelps, Alan D.R.; Cross, Adrian W.

2019. Paper presented at 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), London, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Design of a metamaterial cavity for harmonic terahertz gyrotrons

AU - Zhang, Zi-Wen

AU - Du, Chao-Hai

AU - Li, Fan-Hong

AU - Zhu, Juan-Feng

AU - Liu, Pu-Kun

AU - Zhang, Liang

AU - He, Wenlong

AU - Yin, HuaBi

AU - Ronald, Kevin

AU - Phelps, Alan D.R.

AU - Cross, Adrian W.

PY - 2019/8/20

Y1 - 2019/8/20

N2 - A resonant cavity is developed with a metallic photonic crystal (MPC) to reduce the magnetic field strength and suppress mode competition for a terahertz fourth-harmonic gyrotron. Due to the photonic band gap, electromagnetic waves radiated in certain directions at specified frequencies cannot propagate in the photonic crystal. The dispersion relations of MPC were numerically calculated using a finite-difference frequency-domain method. The gap map for a square lattice of metallic rods was derived from the dispersion relations as the radius of the rods varies. The map of the localized modes in the defects was plotted to illustrate the connection between the band structure and the TE modes. The MPC cavity was simulated and better performance was demonstrated in terms of mode competition compared with a circular waveguide cavity of equivalent cut-off radius at 1-THz.

AB - A resonant cavity is developed with a metallic photonic crystal (MPC) to reduce the magnetic field strength and suppress mode competition for a terahertz fourth-harmonic gyrotron. Due to the photonic band gap, electromagnetic waves radiated in certain directions at specified frequencies cannot propagate in the photonic crystal. The dispersion relations of MPC were numerically calculated using a finite-difference frequency-domain method. The gap map for a square lattice of metallic rods was derived from the dispersion relations as the radius of the rods varies. The map of the localized modes in the defects was plotted to illustrate the connection between the band structure and the TE modes. The MPC cavity was simulated and better performance was demonstrated in terms of mode competition compared with a circular waveguide cavity of equivalent cut-off radius at 1-THz.

KW - harmonic operation

KW - photonic crystal

KW - photonic band gap

KW - mode competition

KW - gyrotron

UR - http://imws2014.eecs.qmul.ac.uk/

M3 - Paper

ER -

Zhang Z-W, Du C-H, Li F-H, Zhu J-F, Liu P-K, Zhang L et al. Design of a metamaterial cavity for harmonic terahertz gyrotrons. 2019. Paper presented at 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), London, United Kingdom.