Vertical split-ring resonator based nanoplasmonic sensor

Pin Chieh Wu, Greg Sun, Wei Ting Chen, Kuang Yu Yang, Yao Wei Huang, Yi Hao Chen, Hsiang Lin Huang, Wei Lun Hsu, Hai Pang Chiang, Din Ping Tsai

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

Split-ring resonators (SRRs) have been the subject of investigation as plasmonic sensors that operate by sensing plasmon resonance shift δλ when exposed to a medium with a refractive index change δn. 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
Volume105
Issue number3
DOIs
Publication statusPublished - 2014 Jul 21

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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