title: Spoof surface plasmon polaritons in terahertz transmission through subwavelength hole arrays analyzed by coupled oscillator model.
abstract: Both the localized resonance and excitation of spoof surface plasmon polaritons are observed in the terahertz transmission spectra of periodic subwavelength hole arrays. Analyzing with the coupled oscillator model, we find that the terahertz transmission is actually facilitated by three successive processes: the incident terahertz field first initiates the localized oscillation around each hole, and then the spoof surface plasmon polaritons are excited by the localized resonance, and finally the two resonances couple and contribute to the transmission. Tailoring the localized resonance by hole size, the coupling strength between spoof surface plasmon polaritons and localized resonances is quantitatively extracted. The hole size dependent transmittance and the coupling mechanism are further confirmed by fitting the measured spectra to a modified multi-order Fano model.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Yin
authors.affiliation: Key Laboratory of Microelectronics Devices &Integrated Technology, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China.
authors.forename: Xinchao
authors.initials: X
authors.lastname: Lu
authors.affiliation: School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
authors.forename: Ningning
authors.initials: N
authors.lastname: Xu
authors.affiliation: School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Wang
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Yiwen
authors.initials: Y
authors.lastname: E
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Xuecong
authors.initials: X
authors.lastname: Pan
authors.affiliation: State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, Institute of Photonics &Photon-Technology, Northwest University, Xi'an 710069, China.
authors.forename: Xinlong
authors.initials: X
authors.lastname: Xu
authors.affiliation: Key Laboratory of Microelectronics Devices &Integrated Technology, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China.
authors.forename: Hongyao
authors.initials: H
authors.lastname: Liu
authors.affiliation: Key Laboratory of Microelectronics Devices &Integrated Technology, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Chen
authors.affiliation: School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
authors.forename: Weili
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang