Figure 5.

A thin, single-layered circular dichroic filter was fabricated by transferring the Au nanospiral structure fabricated on a Si substrate onto a flexible and transparent PDMS thin film. (a) SEM image of a side view of the left-handed Au nanospiral structures with a diameter of 70 nm on a Si substrate. (b) Transferred Au nanospiral structures. (c) A photo of the substrate after transferred to a PDMS thin film taken with an optical microscope with bright field. (d) A photo of the substrate after transferred to a PDMS thin film taken with an optical microscope with dark field.