Giant phase retardation of terahertz waves by resonant hyperbolic metasurface

Seojoo Lee, Wontae Kim, Ji Hun Kang, Bongjoo Kang, Fabian Rotermund, Q Han Park

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

Abstract

Due to the relatively weak birefringence of natural materials in terahertz regime, metasurfaces have been proposed for compact terahertz phase modulators since they show effectively strong birefringence only with ultrathin structures. However, previous designs of metasurface show limited phase modulation reaching only up to the quarter-wavelength phase, and there has been no single metasurface design that works for a terahertz half-waveplate. Here, we present a metasurface that modulates the phase variably up to 180 degrees. The phase modulation is achieved by a hyperbolic metasurface composed of periodically arrayed rectangular metal rings with different periods for horizontal and vertical axis. By controlling each period, we show that our hyperbolic metasurface can possess large positive and negative permittivity values for horizontal and vertical axis and the phase shift can reach up to the 180 degrees. To check the validity of our design, we fabricate reconfigurable metasurface films and demonstrate the phase modulation 90 to 180 degrees. All results show good agreement with numerical simulation results.

Original languageEnglish
Title of host publicationPhotonic and Phononic Properties of Engineered Nanostructures VIII
PublisherSPIE
Volume10541
ISBN (Electronic)9781510615670
DOIs
Publication statusPublished - 2018 Jan 1
EventPhotonic and Phononic Properties of Engineered Nanostructures VIII 2018 - San Francisco, United States
Duration: 2018 Jan 292018 Feb 1

Other

OtherPhotonic and Phononic Properties of Engineered Nanostructures VIII 2018
CountryUnited States
CitySan Francisco
Period18/1/2918/2/1

Keywords

  • metamaterials
  • phase retardation
  • terahertz
  • waveplates

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Giant phase retardation of terahertz waves by resonant hyperbolic metasurface'. Together they form a unique fingerprint.

  • Cite this

    Lee, S., Kim, W., Kang, J. H., Kang, B., Rotermund, F., & Park, Q. H. (2018). Giant phase retardation of terahertz waves by resonant hyperbolic metasurface. In Photonic and Phononic Properties of Engineered Nanostructures VIII (Vol. 10541). [1054122] SPIE. https://doi.org/10.1117/12.2288060