A study of trapped mode resonances in asymmetric X-shape resonator for frequency selective surface

Kejian Chen; Hong Liu; Yiqi Wang; Yiming Zhu

doi:10.1117/12.2032882

23 August 2013 A study of trapped mode resonances in asymmetric X-shape resonator for frequency selective surface

Kejian Chen, Hong Liu, Yiqi Wang, Yiming Zhu

Proceedings Volume 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications; 89090C (2013) https://doi.org/10.1117/12.2032882
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

FSS is a two-dimensional periodic array of resonating metallic-dielectric structures, When FSS device steps into Terahertz range from microwave range, it is studied as THz functional components (such as Terahertz filter, Terahertz biochemical sensor, etc.) to promote the functionality of the THz spectroscopy/imaging system. When the device requires a narrow band transmission window for frequency selecting or a high electric field concentration in certain area to improve its sensitivity for sensing, normally, a high quality (Q) resonant structure can give helps. Recently, high-Q resonance induced by trapped mode resonance i studied widely in FSS research areas. To induce trapped mode resonance, one can simply break the symmetric of the unit structure of FSS. In this paper, several asymmetric X-shaped resonators for FSS working in terahertz range have been studied numerically. To compare the behaviour of X-shape resonator under different conditions (with additional part: Heart lines, Shoulder lines, Wrap or Shoes squares), a common platform (θ=60, θis angle of X shape) which is suitable for most of cases was used to make the study more meaningful. As the field enhancement behaviour is related to the trapped mode introduced by the asymmetric structure, we propose such kind of device to be used as a high quality filter or as a sensing element for biochemical samples.

Citation Download Citation

Kejian Chen, Hong Liu, Yiqi Wang, and Yiming Zhu "A study of trapped mode resonances in asymmetric X-shape resonator for frequency selective surface", Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 89090C (23 August 2013); https://doi.org/10.1117/12.2032882

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