Fig. 1. Schematic diagram of chiral unit cell composed of rotating helix. (a)Three-dimensional view; (b) top view

Fig. 2. CD and transmittance spectra of structure for RCP and LCP incident waves

Fig. 3. Distributions of electric field intensities at different cross sections vertical to incident direction under RCP and LCP waves at wavelength of 7.95 µm

Fig. 4. CD properties of original structure, same periodic single helical structure and diffreent angle rotating helical structures

Fig. 5. Distributions of electric field intensities of structure 2 at different cross sections vertical to incident direction under RCP and LCP waves at wavelength of 4.97 µm

Fig. 6. CD properties of structures with 1, 2, and 3 turns of helices, respectively

Fig. 7. Transmittance spectra of structures for LCP and for RCP waves when turn numbers of helices are 1 turn, 2 turns, and 3 turns, respectively

Fig. 8. CD properties of structures when helical radii are 0.8 and 1.2 times of original radius, respectively

Fig. 9. CD properties of structures with different pitches of helices of 2.0, 2.2 and 2.4 µm, respectively

Fig. 10. CD properties of structures with different wire radii of 0.15, 0.20, and 0.25 µm, respectively.

Fig. 11. CD properties of structures when helical radii of subunit cells are 0.25, 0.30, 0.35, and 0.40 µm, and helical turns of subunit cells are 1.5, 2, 2.5, and 3, respectively

Fig. 12. CD properties of structures with different components consisting of ITO, Au and Ag, respectively