Cavity-enhanced localized plasmon resonance sensing

Ralf Ameling, Lutz Langguth, Mario Hentschel, Martin Mesch, Paul V. Braun, Harald Giessen

Research output: Contribution to journalArticlepeer-review


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-Ṕrot 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.

Original languageEnglish (US)
Article number253116
JournalApplied Physics Letters
Issue number25
StatePublished - Dec 20 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Cavity-enhanced localized plasmon resonance sensing'. Together they form a unique fingerprint.

Cite this