By introducing geometrical-scaling-induced phase modulations, we demonstrate in this work that an assembly of circularly polarized and linearly polarized states can be simultaneously generated by a single metasurface made of L-shaped resonators with different geometrical features. Each resonator of the metasurface diffracts either a right-handed or left-handed circular polarized states, with an additional phase modulation determined by its geometry features. The interaction of the diffracted fields leads to the desired output beams, where the polarization state and the propagation direction can be accurately controlled. As an example of potential applications, we show that an image can be encoded with different polarization profiles at different diffraction orders and decoded with a polarization analyzer. This approach resolves a challenging problem in integrated optics and is inspiring for on-chip quantum information processing.
In this talk, we present our recent work on tuning the polarization states of light wave with 2D or 3D metastructures. First, we illustrate an approach to tune the phase difference of light via time retardation in a microstructured surface. Second, we demonstrate a general mechanism to construct the dispersion-free metastructure. Third, we present a freely tunable polarization rotator for broadband terahertz waves using a metastructure, and also an example on dynamically-switching the polarization state based on the phase transition of vanadium dioxide. The investigations provide some guidelines to control the polarization state of light at subwavelength scale.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.