Circular polarization selection of light is an important property of helical micro-nanostructure. The helical thin films fabricated by glancing angle deposition can provide both circular polarization selection and wavelength tuning in this work. Their selective transmissions were depicted in calculations and experiments. The wavelength tuning mechanism was revealed as the relationship between peak wavelength and deposition parameters. Therefore, tunable circular polarization components can be designed according to the mechanism mentioned above and fabricated by glancing angle deposition techniques. Potential applications include tunable optical filters, optical pulse-shapers, biosensors etc.
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