Off-axis spectral resolution via all-dielectric dispersive metadevice

Naureen Butt; Yousaf Murtaza Rind; M. Qasim Mehmood; Tauseef Tauqeer; Danial Khan; Yehia Massoud

doi:10.1117/12.2687662

28 November 2023 Off-axis spectral resolution via all-dielectric dispersive metadevice

Naureen Butt, Yousaf Murtaza Rind, M. Qasim Mehmood, Tauseef Tauqeer, Danial Khan, Yehia Massoud

Proceedings Volume 12773, Nanophotonics and Micro/Nano Optics IX; 127731L (2023) https://doi.org/10.1117/12.2687662
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

Effective dispersion management is critical in constructing super prism, spectrometers, and achromatic lens-based optical systems. Metasurfaces, the artificially engineered structures, promise the miniaturization of such dispersive devices to enable compactness and integration with on-chip devices. The miniaturization is due to the planar nature of the fundamental building blocks that offer unprecedented control of optical properties of light, such as phase, amplitude, and polarization. These building blocks abruptly vary the light characteristics to engineer the output behavior. The response of the metasurface depends upon geometry and material, which, in turn, is dependent on the wavelength of the incident light, amongst other factors. Conventional ways of dispersion management are not only complex but also give rise to aberration-related challenges. Metasurfaces provide alternatives to combat the above-said limitation. A single-layered, single-cell driven all-dielectric super dispersive metalens is not reported for the visible regime. Here, we proposed a zinc sulfide (ZnS) based highly dispersive metalens with a parabolic phase profile that operates in the visible spectrum and resolves the spectrum of the incident wave by dispersing different wavelengths to different positions at the edge of the metasurface for easy instrumentation integration. Simulations are carried out to verify the proposed design's theoretical dispersion characteristics. The proposed element's high transmission and polarization conversion efficiency ensure broad practical usage. The proposed metasurface can potentially be used in spectrometers, tomography, microscopy, etc.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Naureen Butt, Yousaf Murtaza Rind, M. Qasim Mehmood, Tauseef Tauqeer, Danial Khan, and Yehia Massoud "Off-axis spectral resolution via all-dielectric dispersive metadevice", Proc. SPIE 12773, Nanophotonics and Micro/Nano Optics IX, 127731L (28 November 2023); https://doi.org/10.1117/12.2687662

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