Dynamic reflection phase and polarization control in metasurfaces

Junghyun Park, Ju Hyung Kang, Soo Jin Kim, Xiaoge Liu, Mark L. Brongersma

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

Optical metasurfaces are two-dimensional optical elements composed of dense arrays of subwavelength optical antennas and afford on-demand manipulation of the basic properties of light waves. Following the pioneering works on active metasurfaces capable of modulating wave amplitude, there is now a growing interest to dynamically control other fundamental properties of light. Here, we present metasurfaces that facilitate electrical tuning of the reflection phase and polarization properties. To realize these devices, we leverage the properties of actively controlled plasmonic antennas and fundamental insights provided by coupled mode theory. Indium-tin-oxide is embedded into gap-plasmon resonator-antennas as it offers electrically tunable optical properties. By judiciously controlling the resonant properties of the antennas from under- to overcoupling regimes, we experimentally demonstrate tuning of the reflection phase over 180°. This work opens up new design strategies for active metasurfaces for displacement measurements and tunable waveplates.

Original languageEnglish
Pages (from-to)407-413
Number of pages7
JournalNano Letters
Volume17
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • Electrical gating
  • Metasurface
  • Phase control
  • Polarization control

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Dynamic reflection phase and polarization control in metasurfaces'. Together they form a unique fingerprint.

  • Cite this