Plasmonic Focusing of a High-Order Cylindrical Vector Beam for On-Chip Detection
Hao Wang,
Jinzhan Zhong,
Xinrui Lei
et al.
Abstract:We investigate the interaction between cylindrical vector beams (CVBs) and metallic annular structures. The mechanisms for plasmonic focusing and field distributions are studied both analytically and numerically. We demonstrate that the focusing patterns are locked with the order of CVBs due to the polarization selectivity for the excitation of plasmonic fields, which can be employed as a simplified yet efficient means of characterizing and detecting CVBs. The robustness of the focusing pattern is analyzed as … Show more
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