Dynamic Chiral Metasurfaces for Broadband Phase-Gradient Holographic Displays

Taimoor Naeem, Joohoon Kim, Hafiz Saad Khaliq, Junhwa Seong, Muhammad Tariq Saeed Chani, Tauseef Tauqeer*, Muhammad Qasim Mehmood*, Yehia Massoud*, Junsuk Rho*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Next-generation holographic displays have promising applications in medical science, augmented/virtual reality, smart security, data encryption, etc. Although metasurfaces emerged as the suitable choice to provide compact holographic displays, multifunctionality in metasurfaces at broadband optical wavelengths is inevitable for the abovementioned applications. Here, a metasurface is demonstrated based on chiral structures to introduce multifunctionality in terms of multiple wavefront information depending upon the polarization of incident light. The proposed metasurface integrated with a liquid crystal (LC) provides fast switching and dynamic optical response at broadband visible wavelengths in transmission mode. To avoid the phase distortion in multiple wavefront information embedded into a single planar metasurface, chiral z-shaped meta-atoms are used to provide high diffraction efficiency and phase chirality response for circularly polarized (CP) light illuminations. The phase mask of holographic information is encoded into the metasurface using a combination of dynamic and geometric phase modulation techniques. The experimental validation of the designed metasurface is performed to reproduce the spin-dependent-specific information at broadband visible wavelengths for changing the polarization of incident light. This research may pave the way toward designing highly efficient multifunctional metadevices to produce next-generation holographic displays for promising applications in healthcare, media, smart security, and data encryption.

Original languageEnglish (US)
Article number2202278
JournalAdvanced Optical Materials
Volume11
Issue number5
DOIs
StatePublished - Mar 3 2023

Bibliographical note

Funding Information:
T.N., J.K., and H.S.K. contributed equally to this work. This work was financially supported by the POSCO‐POSTECH‐RIST Convergence Research Center program funded by POSCO, and the National Research Foundation (NRF) grants (Nos. NRF‐2022M3C1A3081312, NRF‐2022M3H4A1A02074314, and NRF‐2021M3H4A1A04086554) funded by the Ministry of Science and ICT of the Korean government. J.K. acknowledges the POSTECH Alchemist fellowship. M.T.S.C. acknowledges the funding support from the Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah, under grant no. DF‐030‐130‐1441. Y.M. acknowledges the research funding to Innovative Technologies Laboratories (ITL) from King Abdullah University of Science and Technology (KAUST).

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • broadband
  • multifunctionality
  • phase-holographic displays
  • spin-decoupling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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