All-silicon metasurface-enabled non-coaxial superposition of vector vortex beams

Hui Li; Hang Xu; Chunyu Song; Fan Yang; Wei Shi; Yating Zhang; Jianquan Yao

doi:10.1117/12.2688652

26 November 2023 All-silicon metasurface-enabled non-coaxial superposition of vector vortex beams

Hui Li, Hang Xu, Chunyu Song, Fan Yang, Wei Shi, Yating Zhang, Jianquan Yao

Proceedings Volume 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X; 1277618 (2023) https://doi.org/10.1117/12.2688652
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

Vector vortex beams (VVBs) possess a variety of application scenarios, ranging from particle capture to quantum information. Recently, applied metasurfaces have simplified traditional bulk-complex systems for evaluating VVBs in the terahertz (THz) band and have successively demonstrated the evolution of their coaxial polarization states. Nevertheless, it is quite challenging to obtain the polarization singularities when non-coaxial superposition is performed by two ondemand multiplexed VVBs. Here, an all-dielectric metasurface platform working in the THz band is evaluated utilizing polarization-multiplexing coding techniques, and the platform can be used to explore the non-coaxial superposition state of two identical VVBs. The employment of spin-polarization multiplexing techniques gives higher encoding degrees of freedom within the orthogonal circular polarization channel, enabling the superposition behavior of inhomogeneous polarization states to be performed at predefined focal planes. A systematic analysis of the newly generated polarization singularities in the interaction region is performed by applying the full Stokes polarization vector. With the ultra-compact configuration, the experimental results obtained by the proposed strategy under THz wave illumination exhibit good agreement with the numerical simulations. Thus, such mechanisms offer potential applications for multiple particle capture based on non-coaxial superimposition of VVB and provide efficient meta-platform in data encryption, high-resolution imaging, and multiplex communication.

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

Citation Download Citation

Hui Li, Hang Xu, Chunyu Song, Fan Yang, Wei Shi, Yating Zhang, and Jianquan Yao "All-silicon metasurface-enabled non-coaxial superposition of vector vortex beams", Proc. SPIE 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X, 1277618 (26 November 2023); https://doi.org/10.1117/12.2688652

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