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Influence of the geometry of a gammadion stereo-structure chiral metamaterial on optical properties

Abstract In this paper, a gammadion stereo-structure (GSS) chiral metamaterial (CMM) is described and numerically analysed at optical frequencies. The influence of the geometry of the proposed CMM on the optical properties was studied systematically. The numerical simulations exhibit that the giant circular dichroism (CD) effect, optical activity and negative refraction can be obtained by properly selecting the geometric parameters, respectively. Given the pronounced optical effects and the negative refraction property of stereo-structure CMM, many applications in ultra-compact polarization components, integrated photonics, plasmonic-enhanced sensing of biochemical substances and CD spectroscopic analysis can be envisioned easily.