Abstract
In recent years, metasurfaces, a flat version of three-dimensional metamaterials, have become a versatile nanophotonics platform for unprecedented light manipulation. Amongst the numerous realizations of exotic optical phenomena through metasurfaces such as meta-lensing, meta-holography, and structured beams, Bessel beam generation caught significant attention due to its non-diffracting and self-healing nature. Bessel beams can be produced using various conventional methods, including spatial light modulators, composite holograms, and diffractive optical elements. These methods, however, are unfit to integrate with cutting-edge on-chip devices due to low throughput, polarization dependence, excessive bulkiness, and limited numerical aperture. In the method of generating Bessel beams through flat optics, the selection of suitable material is a crucial factor. Thus, due to constraints of inherent material properties, broadband operation with high efficiency remains challenging. Here, we demonstrated highly efficient broadband Bessel beams generating meta-devices in the visible domain using single-layer all-dielectric transmissive metasurfaces. The constituent nanoresonators of zinc sulfide (ZnS) are optimized for high-resolution phase modulation. ZnS offers the best-suited optical properties that ensure high transmission efficiency throughout the visible spectrum. To verify the proposed design technique, we realized single-element-driven meta-devices to generate Bessel beams with higher numerical apertures and different topological charges, illustrating their exceptional non-diffraction properties. For real-life applications like optical communication, the proposed design strategy could speed up consumer-level device implementation.
Original language | English (US) |
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Title of host publication | Holography, Diffractive Optics, and Applications XIII |
Editors | Changhe Zhou, Ting-Chung Poon, Liangcai Cao, Hiroshi Yoshikawa |
Publisher | SPIE |
ISBN (Electronic) | 9781510667853 |
DOIs | |
State | Published - 2023 |
Event | Holography, Diffractive Optics, and Applications XIII 2023 - Beijing, China Duration: Oct 14 2023 → Oct 16 2023 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 12768 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Conference
Conference | Holography, Diffractive Optics, and Applications XIII 2023 |
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Country/Territory | China |
City | Beijing |
Period | 10/14/23 → 10/16/23 |
Bibliographical note
Publisher Copyright:© 2023 SPIE.
Keywords
- Bessel beam
- broadband meta-device
- Flat optics
- twisted light beams
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering