Broadband all-dielectric meta-devices for visible perfect vortex beams generation

M. Danial Shafqat; Nasir Mahmood; Yehia Massoud

doi:10.1117/12.2687638

27 November 2023 Broadband all-dielectric meta-devices for visible perfect vortex beams generation

M. Danial Shafqat, Nasir Mahmood, Yehia Massoud

Proceedings Volume 12768, Holography, Diffractive Optics, and Applications XIII; 127682I (2023) https://doi.org/10.1117/12.2687638
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

Conventional optical elements are typically designed for a specific wavelength and have limited functionality, hindering their practical applications and integration with on-chip devices. Recently developed artificially engineered structures overcome this constraint but at the cost of added design complexity. Here, we present broadband single-layered metadevices capable of integrating multiple functionalities that generate nondiffracting perfect vortex beams for visible wavelengths (475 to 650 nm). To realize highly efficient all-dielectric meta-devices, zinc sulfide material is exploited due to its large transparent window with a sufficiently high refractive index in the visible regime. The nondiffracting response provides a significantly long propagation distance without abrupt divergence. Moreover, shorter optical wavelengths provide more data bandwidth when mixed with a high topological charge (n = 8) of the perfect vortex beam, which paved the path towards the realization of numerous applications such as optical tweezing, quantum information processing, and optical communication.

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

Citation Download Citation

M. Danial Shafqat, Nasir Mahmood, and Yehia Massoud "Broadband all-dielectric meta-devices for visible perfect vortex beams generation", Proc. SPIE 12768, Holography, Diffractive Optics, and Applications XIII, 127682I (27 November 2023); https://doi.org/10.1117/12.2687638

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