Broadband Multifunctional Achromatic Metalens

Isma Javed, Azhar Javed Satti, Muhammad Ashar Naveed, Muhammad Zubair, Muhammad Qasim Mehmood, Yehia Massoud

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Metasurfaces offer novel design capability of optical wavefront shaping to realize ultra-compact flat optical components which have remarkable potential to mitigate the constraints of size and design complexities in imaging systems. However, aberration correction and diffraction-limited response over the broad spectrum greatly hindered their applicability because of simultaneous phase engineering at multiple wavelengths on a single metasurface interface. Conventionally reported design methodologies overcome the challenges mentioned earlier by exploiting resonance tuning, layer stacking, and phase mergence strategies. They suppressed the aberration effect with high efficiency but have complex design and meta-atom geometry with limited functionalities. Here in this research script, we have introduced broadband achromatic bifocal metalens based on a single-layer array of nano-rectangular bars in transmission mode. In order to have wavelength-independent focusing, we developed a library of meta-atoms to provide required phase compensations. In addition to this, a novel material zinc selenide (ZnSe) is introduced as a constituent which is a large transparent window in the optical regime. The high efficiency and unprecedented capability of aberration correction along with multi-functionality make the proposed metalens a potential candidate for next-generation advanced imaging technology.

Original languageEnglish (US)
Title of host publicationNanophotonics and Micro/Nano Optics IX
EditorsZhiping Zhou, Kazumi Wada, Limin Tong
PublisherSPIE
ISBN (Electronic)9781510667952
DOIs
StatePublished - 2023
EventNanophotonics and Micro/Nano Optics IX 2023 - Beijing, China
Duration: Oct 14 2023Oct 16 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12773
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceNanophotonics and Micro/Nano Optics IX 2023
Country/TerritoryChina
CityBeijing
Period10/14/2310/16/23

Bibliographical note

Publisher Copyright:
© 2023 SPIE. All rights reserved.

Keywords

  • Achromatic metalens
  • broadband multifunctional metasurface
  • zinc selenide

ASJC Scopus subject areas

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

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