Polarization independent high transmission large numerical aperture laser beam focusing and deflection by dielectric Huygens’ metasurfaces

Aytekin Özdemir, Zeki Hayran, Yuzuru Takashima, Hamza Kurt

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

In this letter, we propose all-dielectric Huygens’ metasurface structures to construct high numerical aperture flat lenses and beam deflecting devices. The designed metasurface consists of two-dimensional array of all-dielectric nanodisk resonators with spatially varying radii, thereby introducing judiciously designed phase shift to the propagating light. Owing to the overlap of Mie-type magnetic and electric resonances, high transmission was achieved with rigorous design analysis. The designed flat lenses have numerical aperture value of 0.85 and transmission values around 80%. It also offers easy fabrication and compatibility with available semiconductor technology. This spectrally and physically scalable, versatile design could implement efficient wavefront manipulation or beam shaping for high power laser beams, as well as various optical microscopy applications without requiring plasmonic structures that are susceptible to ohmic loss of metals and sensitive to the polarization of light.

Original languageEnglish (US)
Pages (from-to)46-53
Number of pages8
JournalOptics Communications
Volume401
DOIs
StatePublished - Oct 15 2017

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Keywords

  • Metamaterials
  • Metasurfaces
  • Phase shift
  • Subwavelength structures

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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