Metasurfaces-based holography and beam shaping: Engineering the phase profile of light

Research output: Contribution to journalReview articlepeer-review

Abstract

The ability to engineer and shape the phase profile of optical beams is in the heart of any optical element. Be it a simple lens or a sophisticated holographic element, the functionality of such components is dictated by their spatial phase response. In contrast to conventional optical components which rely on thickness variation to induce a phase profile, metasurfaces facilitate the realization of arbitrary phase distributions using large arrays with sub-wavelength and ultrathin (tens of nanometers) features. Such components can be easily realized using a single lithographic step and is highly suited for patterning a variety of substrates, including nonplanar and soft surfaces. In this article, we review the recent developments, potential, and opportunities of metasurfaces applications. We focus primarily on flat optical devices, holography, and beam-shaping applications as these are the key ingredients needed for the development of a new generation of optical devices which could find widespread applications in photonics.

Original languageEnglish
Pages (from-to)137-152
Number of pages16
JournalNanophotonics
Volume6
Issue number1
DOIs
StatePublished - 1 Jan 2017

Keywords

  • flat optics
  • holography
  • metasurfaces
  • nano antennas
  • plasmonics

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