1. Meta-facet fiber for twisting ultra-broadband light with high phase purity.
- Author
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Zhao, Yifan, Zhang, Jinrun, Du, Jing, and Wang, Jian
- Subjects
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ULTRA-wideband devices , *OPTICAL polarization , *FOURIER transform optics , *OPTICAL fibers , *QUANTUM mechanics - Abstract
From metamaterial to metasurface and metadevice, the artificial structure with sub-wavelength scale on diverse platforms offers the ability to shape light in a custom way. The optical fiber is a robust and flexible media that has seen wide applications in optical communications, optical sensing, microscopy, and endoscope imaging. Here, we consider metasurface on a large-core fiber platform for twisting light. Using the designed and fabricated meta-facet fiber, we demonstrate (i) the excitation of both linearly polarized and circularly polarized twisted light (OAM+1, OAM−1) from either meta-facet side or planar-facet side, (ii) phase-front reconstruction of twisted light simply from a tilt interferogram using the Fourier-transform method, and (iii) ultra-broadband response from 1480 to 1640 nm with high phase purity above 93% for twisting light. The demonstrations on meta-facet fiber for twisting ultra-broadband light with high phase purity may open up perspectives to more emerging applications in information, biology, and medical science. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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