Multi-band perfect vortex beam generation using all-dielectric metasurface

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

doi:10.1117/12.2687667

28 November 2023 Multi-band perfect vortex beam generation using all-dielectric metasurface

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

Proceedings Volume 12773, Nanophotonics and Micro/Nano Optics IX; 127731I (2023) https://doi.org/10.1117/12.2687667
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

Vortex beams offer a novel avenue for advancing information transmission, storage, and processing within the optical domain. However, conventional optical apparatus and systems depend on the phase accumulation technique to create vortex beams. These methods frequently lead to the development of cumbersome and expensive configurations, hindering the integration with on-chip photonic systems. Metasurfaces, planar structures composed of nano-elements, hold immense promise for extensive adoption in optics and photonics. Their remarkable capacity to manipulate light at the nano-level has led to widespread utilization, particularly in generating optical vortices. In this work, we proposed an all-dielectric transmissive metasurface platform that generates a perfect vortex beam with a trigonometric function embedded in it to achieve an infinite topological charge. We selected silicon nitride (Si3N4) as the material of choice. It exhibits transparency in the ultraviolet (UV) region and across the visible spectrum. It also exhibits best-suited optical properties to ensure exceptional response in the targeted dual bands. We selected a numerical aperture of NA = 0.7 for verification of the concept, and two trigonometric functions are θ. cos⁡(θ) and ½ sin⁡(θ). The presented design technique and material may find potential applications in biomedicine, free-space optical data communications, and optical data modulation.

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

Citation Download Citation

M. Danial Shafqat, Yousaf Murtaza Rind, M. Qasim Mehmood, Tauseef Tauqeer, Danial Khan, and Yehia Massoud "Multi-band perfect vortex beam generation using all-dielectric metasurface", Proc. SPIE 12773, Nanophotonics and Micro/Nano Optics IX, 127731I (28 November 2023); https://doi.org/10.1117/12.2687667

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available