Fiber-integrated catenary wave-driven metasurfaces for beam focusing

Zhongyue Luo; Wentao Zhang; Libo Yuan; Hongchang Deng

doi:10.1117/12.3008053

24 November 2023 Fiber-integrated catenary wave-driven metasurfaces for beam focusing

Zhongyue Luo, Wentao Zhang, Libo Yuan, Hongchang Deng

Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 129354L (2023) https://doi.org/10.1117/12.3008053
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China

Abstract

Metasurfaces have been integrated on optical fiber with the advancing stage of nanofabrication technologies, and the combination of them has expanded the application prospect of "Lab-on-fiber". It is worth noting that most optical fiber integrated metasurfaces devices adopt the method of integrating the metasurfaces at the optical fiber end, the dimension of optical manipulation in the free space is limited above the optical fiber end. In this paper, we proposed an optical waveform conversion device based on micro-nano optical fiber integrated catenary wave-driven metasurfaces. Around the surface of micro-nano optical fiber, wave-driven metasurfaces composed of a series of catenary-shaped rings are introduced to realize beam focusing from guided mode of optical fiber to the out-plane mode in the free space. We demonstrated that the input light with wavelength of 980 nm was injected into the micro-nano optical fiber to form the fundamental mode (FM) guided in the core, then the FM was radiated to the free space form beam focusing by the catenary-shaped rings. Especially, the outline of catenary is equivalent to a convex lens, the beam focusing can be enhanced. In addition, adjusting the horizontal span, height of catenary, the intensity, position and shape of focus points can be controlled. Moreover, we changed the angle between the catenary-shaped rings and the polarization direction of the FM, the focus points can be symmetric and asymmetric rotated. The device has potential applications in the fields of optical communication, optical manipulation, and optical imaging.

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

Citation Download Citation

Zhongyue Luo, Wentao Zhang, Libo Yuan, and Hongchang Deng "Fiber-integrated catenary wave-driven metasurfaces for beam focusing", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 129354L (24 November 2023); https://doi.org/10.1117/12.3008053

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KEYWORDS

Optical fibers

Free space

Polarization

Phase shifts

Optoelectronics

Wave propagation

Metalenses

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