31 October 2016 Multimode fiber focusing lens based on plasmonic structures
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In the present work, a compact all-fiber plasmonic focusing beam generator with single and multiple spots is proposed and demonstrated in a conventional multimode fiber. Here, the focusing beam generator is composed of air slit arrays perforated through the gold films deposited on the end facet of a multimode fiber. The array of nanoscale slits with varying widths is used to modulate phase distribution of the focused light. An all-fiber focusing beam generator provides many advantages, such as self-alignment, high flexibility, lower insert loss, and easy portability, which is of importance to realize optical trapping, micromanipulation, beam shaping, and fiber integrated devices.
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Yihang Xu, Yongjiao Lu, Zheng Zhu, Jinhui Shi, Chunying Guan, Libo Yuan, "Multimode fiber focusing lens based on plasmonic structures", Proc. SPIE 10019, Optoelectronic Devices and Integration VI, 100191C (31 October 2016); doi: 10.1117/12.2246153; https://doi.org/10.1117/12.2246153


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