Optimized fan-shaped chiral metamaterial as an ultrathin narrow-band circular polarizer at visible frequencies.
Nanotechnology
; 29(16): 165301, 2018 Apr 20.
Article
em En
| MEDLINE
| ID: mdl-29438106
ABSTRACT
Chiral metamaterials have the great ability to manipulate the circular polarizations of light, which can be utilized to build ultrathin circular polarizers. Here we build a narrow-band circular polarizer at visible frequencies based on plasmonic fan-shaped chiral nanostructures. In order to achieve the best optical performance, we systematically investigate how different fabrication factors affect the chiral optical response of the fan-shaped chiral nanostructures, including incident angle of vapor depositions, nanostructure thickness, and post-deposition annealing. The optimized fan-shaped nanostructures show two narrow bands for different circular polarizations with the maximum extinction ratios 7.5 and 6.9 located at wavelength 687 nm and 774 nm, respectively.
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MEDLINE
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En
Ano de publicação:
2018
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Article