Color-Selective and Versatile Light Steering with up-Scalable Subwavelength Planar Optics
No Thumbnail Available
Martin, O. J. F.
Resonant waveguide gratings (RWGs) are subwavelength structures of great interest for biosensors, optical filters and optical security applications. We demonstrate and characterize a beam steering device, where the in coupling and out-coupling processes make use of different RWGs that share the same ultrathin dielectric waveguide. This device enables selective color-filtering and redirection of a white light source (such as a white LED). Furthermore, this structure is compatible with up-scalable fabrication processes such as roll-to-roll replication, and is relevant for high-volume production. Because of its color selectivity and its use in low coherence illumination conditions, such a beam steering device could be implemented in a variety of optical applications such as optical security,multifocal or monochromatic lenses, biosensors, and see-through optical combiners for near-eye displays.
Acs Photonics, vol. 4 (5), pp. 1060-1066, May 2017.