Optical response in subnanometer hollow sodium nanowires
Review articleOpen access

Highlights•Study the nonlocal effects in supernano plasmonic systems.•Nonlocal effects greatly modify the plasmonic modes of field enhancements.•Quadrupolar mode is insensitive to the size of nanowire or hollow core.•The nanofocusing and multimodes emerge in noconcentric hollow nanowires.•It has applications in antenna, sensing and nonlinear optics at nano-scale.

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