Figure 2

Transmittance spectra of circularly-polarized-light through metal-oxides chiral films and their differences.
(a) Transmittance spectra of LCP (solid lines) and RCP (dotted lines) light through the TiO2 (black), the SnO2 (blue) and the hetero (red)-chiral films. (b) Difference in the transmitted LCP and RCP light through the chiral films indicating the magnitude of chiroptical responses. Chiroptical response of the hetero-chiral film (solid line) results from the combination of that of both single chiral films (dotted lines).