Vertical split-ring resonator based nanoplasmonic sensor
Vertical split-ring resonator based nanoplasmonic sensor
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DOI：
10.1063/1.4891234
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发表时间：
2014-07-21
影响因子：
4
通讯作者：
Tsai, Din Ping
中科院分区：
文献类型：
--
作者：
Wu, Pin Chieh;Sun, Greg;Tsai, Din Ping
开口环谐振器（SRR）已经成为作为等离子体传感器的研究主题，其通过在暴露于具有折射率变化Δ n的介质时感测等离子体共振位移Δ λ来操作。然而，传统的平面SRR的等离子体激元场扩散到衬底中，减少了可访问的传感体积及其传感性能。这样的限制可以用垂直SRR来消除，其中位于SRR间隙中的等离子体场从衬底上剥离，从而允许大大增强的灵敏度。在这里，我们证明了最高的灵敏度在光频率的报告基于SRR的传感器。(c)2014年作者。除非另有说明，否则所有文章内容均根据Creative Commons Attribution 3.0 Unported License许可。
Split-ring resonators (SRRs) have been the subject of investigation as plasmonic sensors that operate by sensing plasmon resonance shift delta lambda when exposed to a medium with a refractive index change delta 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. (c) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.