Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Figure 11

Geometry and the performance of the helix chiral metamaterial. (a) Focused-ion-beam (FIB) cut of a polymer structure partially filled with gold by electroplating. (b) Oblique view of a left-handed helix structure after removal of the polymer by plasma etching. (c) Top-view image revealing the circular cross section of the helices and the homogeneity on a larger scale. (d, e) Normal-incidence measured transmittance spectra for (d) two pitches of left-handed helices and (e) two pitches of right-handed helices. Figures are reproduced from [84].

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