Cavity-enhanced localized plasmon resonance sensing

被引：258
|
作者：
Ameling, Ralf [1 ,2 ]
Langguth, Lutz [1 ,2 ]
Hentschel, Mario [1 ,2 ]
Mesch, Martin [1 ,2 ]
Braun, Paul V. [3 ]
Giessen, Harald [1 ,2 ]
机构：
[1] Univ Stuttgart, Inst Phys 4, D-70550 Stuttgart, Germany
[2] Univ Stuttgart, Res Ctr SCoPE, D-70550 Stuttgart, Germany
[3] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 25期
关键词：
ELECTROMAGNETICALLY INDUCED TRANSPARENCY; REAL-TIME; NANOPARTICLES; SURFACE; SPECTROSCOPY; SENSOR; SENSITIVITY; ANALOG;
D O I：
10.1063/1.3530795
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a method to enhance the sensing properties of a localized plasmon sensor. The concept is based on the combination of localized plasmons in nanostructures and a photonic microcavity. Metal nanorods that are placed at Bragg distance above a metal mirror form a Fabry-Perot microcavity and constitute a coupled photonic-plasmonic system. The localized plasmon resonances of the nanorods and the phase shifts upon plasmon excitation are extremely sensitive to changes in the refractive index of the material surrounding the nanorods. Compared to the plasmonic nanorods alone, the coupled photonic-plasmonic system allows for a much more sensitive detection of small refractive index changes. (C) 2010 American Institute of Physics. [doi:10.1063/1.3530795]
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页数：3
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