Share Email Print

Proceedings Paper

Multimode metasurfaces: from direct observation of the phase front to advanced optical functions (Conference Presentation)

Paper Abstract

Planar photonic metasurfaces, exhibiting artificial optical effects at the interface, are enabling a broad variety of possibilities as optical elements, communications, and signal processing. The signal we perceive from a metasurface is determined by the phases of the different nanostructures that compose the system. This phase controls the spatial radiation distribution following Huygens’principle and has been utilized in planar optical devices exhibiting negative refraction, cloaking, and holographic elements to name a few. In this presentation, we will first demonstrate the quantitative direct measurement of the phase front produced by a metasurface using digital holography microscopy. We will then show that by designing and tuning the multipolar components of the nanostructured building blocks, it is possible to also control the spectral response as well as the polarization state of the system. By composing a metasurface with such complex nanostructures fabricated in silver, we are able to control the scattered light and channel different colors into different directions. In the second series of experiments, we specifically study the multipolar radiation of a bianisotropic scatterer and use it for the efficient splitting of circularly polarized light, similar to a photonic spin Hall effect. Since the near-field enhancement and circularly polarized scattering in this case occur at the individual antenna level, this planar surface is capable of extracting the fluorescence and controlling the spin-polarized emission from nearby emitters, as will be demonstrated experimentally. These results have practical implications for controlling the optical activity and can potentially enable new polarization-dependent light-emitting devices for applications in imaging, optical communication, and optical displays.

Paper Details

Date Published: 11 October 2017
Proc. SPIE 10346, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XV, 103460U (11 October 2017); doi: 10.1117/12.2272128
Show Author Affiliations
Chen Yan, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Xiaolong Wang, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Kuang-Yu Yang, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Luc Driencourt, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
T. V. Raziman, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Olivier J. F. Martin, Ecole Polytechnique Fédérale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 10346:
Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XV
Din Ping Tsai; Takuo Tanaka, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?