Steering and filtering white light with resonant waveguide gratings

Giorgio Quaranta; Guillaume Basset; Olivier J. F. Martin; Benjamin Gallinet

doi:10.1117/12.2272683

31 August 2017 Steering and filtering white light with resonant waveguide gratings

Giorgio Quaranta, Guillaume Basset, Olivier J. F. Martin, Benjamin Gallinet

Proceedings Volume 10354, Nanoengineering: Fabrication, Properties, Optics, and Devices XIV; 1035408 (2017) https://doi.org/10.1117/12.2272683
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

Abstract

A novel thin-film single-layer structure based on resonant waveguide gratings (RWGs) allows to engineer selective color filtering and steering of white light. The unit cell of the structure consists of two adjacent finite-length and cross-talking RWGs, where the former acts as in-coupler and the latter acts as out-coupler. The structure is made by only one nano-imprint lithography replication and one thin film layer deposition, making it fully compatible with up-scalable fabrication processes. We characterize a fabricated optical security element designed to work with the flash and the camera of a smartphone in off-axis light steering configuration, where the pattern is revealed only by placing the smartphone in the proper position. Widespread applications are foreseen in a variety of fields, such as multifocal or monochromatic lenses, solar cells, biosensors, security devices and seethrough optical combiners for near-eye displays.

Conference Presentation

Citation Download Citation

Giorgio Quaranta, Guillaume Basset, Olivier J. F. Martin, and Benjamin Gallinet "Steering and filtering white light with resonant waveguide gratings", Proc. SPIE 10354, Nanoengineering: Fabrication, Properties, Optics, and Devices XIV, 1035408 (31 August 2017); https://doi.org/10.1117/12.2272683

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