Sub-10 nm particle trapping enabled by a plasmonic dark mode

Fajun Xiao, Yuxuan Ren, Wuyun Shang, Weiren Zhu, Lei Han, Hua Lu, Ting Mei, Malin Premaratne, Jianlin Zhao

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19 Citations (Scopus)


We demonstrate that a highly localized plasmonic dark mode with radial symmetry, termed quadrupole-bonded radial breathing mode, can be used for optically trapping the dielectric nanoparticles. In particular, the annular potential well produced by this dark mode shows a sufficiently large depth to stably trap the 5 nm particles under a relatively low optical power. Our results address the quest for precisely trapping sub-10 nm particles with high yield and pave the way for placing sub-10 nm particles conforming to a specific geometric pattern.

Original languageEnglish
Pages (from-to)3413-3416
Number of pages4
JournalOptics Letters
Issue number14
Publication statusPublished - 15 Jul 2018

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