Polarization tunable all-dielectric color filters based on cross-shaped Si nanoantennas.

ABSTRACT: Polarization sensitive and insensitive color filters have important applications in the area of nano-spectroscopy and CCD imaging applications. Metallic nanostructures provide an efficient way to design and engineer ultrathin color filters. These nanostructures have capability to split the white light into fundamental colors and enable color filters with ultrahigh resolution but their efficiency can be restricted due to high losses in metals especially at the visible wavelengths. In this work, we demonstrate all-dielectric color filters based on Si nanoantennas, which are sensitive to incident-wave polarization and, thus, tunable with the aid of polarization angle variation. Two different information can be encoded in two different polarization states in one nanostructure. The nanoantenna

SUBMITTER: Vashistha V 

PROVIDER: S-EPMC5556121 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature