Vertical split-ring resonator based nanoplasmonic sensor

P.C. Wu, G. Sun, W.T. Chen, K.-Y. Yang, Y.-W. Huang, Y.-H. Chen, H.L. Huang, W.-L. Hsu, H.P. Chiang, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

98 Citations (Scopus)


© 2014 Author(s).Split-ring resonators (SRRs) have been the subject of investigation as plasmonic sensors that operate by sensing plasmon resonance shift ?? when exposed to a medium with a refractive index change ?n. However, conventional planar SRRs have their plasmon fields spread into the substrates, reducing accessible sensing volume and its sensing performance. Such a limitation can be eradicated with vertical SRRs in which the plasmon fields localized in SRR gaps are lifted off from the substrate, allowing for greatly enhanced sensitivity. Here, we demonstrate the highest sensitivity among reported SRR-based sensors in optical frequencies.
Original languageEnglish
Article number033105
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 21 Jul 2014
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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