Controlling nanoscale optical transmission with dielectric metasurfaces at visible wavelengths

Tapashree Roy, Haogang Cai, Subrata Mitra, David Czaplewski, Daniel Lopez

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Recently, metasurfaces and metalenses have become an important subject in the domain of novel optical devices. Numerous nanostructures, with different fundamental principles, materials, and topologies, have been proposed, but general design rules for optimization of their efficiency are not well established yet. Particularly attractive are metasurfaces consisting of Huygens resonators since they offer precise control of the intensity and phase of the transmitted light. In this paper, we demonstrate a Huygens metasurface capable of focusing visible light. We study the impact of the layout of the lens on their efficiency by comparing two metalenses designs: concentric annular regions of equal width and constant phase, with concentric rings defined by individual nano-resonators. The latter provides a better approximation to the ideal phase profile and as a consequence, a high-efficiency lens. Metalenses with both designs were fabricated by e-beam lithography and characterized with a custom-built setup. Experimental results demonstrate that the design with fine discretization improves the lens efficiency by a factor of 2.6.

Original languageEnglish (US)
Title of host publicationHigh Contrast Metastructures VI
EditorsWeimin Zhou, Fumio Koyama, Andrei Faraon, Connie J. Chang-Hasnain
PublisherSPIE
ISBN (Electronic)9781510606678
DOIs
StatePublished - 2017
EventHigh Contrast Metastructures VI - San Francisco, United States
Duration: Jan 31 2017Feb 2 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10113
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHigh Contrast Metastructures VI
CountryUnited States
CitySan Francisco
Period1/31/172/2/17

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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