Broadband computer-generated holography (CGH)-based Bessel beam generation

Isma Javed, Muhammad Asad, Yousaf Murtaza Rind, Azhar Javed Satti, Muhammad Zubair, Muhammad Qasim Mehmood

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

5 Scopus citations

Abstract

In the recent era of development, metasurfaces have provided a new way to develop ultra-compact multifunctional optical devices by overcoming the bottlenecks of traditional bulky optics. Due to phase singularities, metasurface-enabled Bessel beams of higher orders can carry orbital angular momentum (OAM) which makes them a potential candidate for high-capacity communication and data transmission systems. Herein this manuscript, Bessel beams of distinct order are designed using the technology of computer-generated holography for the visible spectrum. For full-range phase coverage, geometric phase modulation is applied along with a spin decoupling strategy to incorporate multifunctionality. The designed metasurface can transform the incident circular polarization component into its orthogonal one and can produce different-order beams. For proof of the broadband optical operation, the response of the designed metasurface is demonstrated at three wavelengths i.e., 488nm, 532nm, and 633nm. Moreover, a highly indexed lossless material zinc selenide (ZnSe) is introduced for the visible spectrum for a highly efficient optical response. The proposed design strategy can be extensively applied in optical communication, photography, optical data storage, and tomography techniques.
Original languageEnglish (US)
Title of host publication2023 4th International Conference on Computing, Mathematics and Engineering Technologies: Sustainable Technologies for Socio-Economic Development, iCoMET 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9798350335316
DOIs
StatePublished - Jan 1 2023
Externally publishedYes

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