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- W3021137886 abstract "Metal nanoparticles can show pronounced optical scattering and absorption maxima at certain wavelengths. At these wavelengths the electromagnetic field is strongly enhanced in volumes much smaller than the diffraction limit. These resonances are called localized surface plasmons and can be used to detect local refractive index changes in their modal volume by spectral shifts of the resonance. Extremely small amounts of molecules can be detected in this way without fluorescence labelling. To reach the goal of single molecule detection the sensitivity of the nanoresonator and the detection process has to be understood to derive a general valid figure of merit (FOM) for optimization. In this work we derive such a FOM based on perturbation theory and the statistical analysis of a noisy detection process. This FOM yields an analytical expression based on the resonators Q factor and field confinement. For the quasistatic case this expression can be written down without further numerical calculations. The scaling of the FOM for different analyte types and noise cases is discussed. The results are validated by experiments and numerical calculations." @default.
- W3021137886 created "2020-05-13" @default.
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- W3021137886 date "2009-01-01" @default.
- W3021137886 modified "2023-10-18" @default.
- W3021137886 title "Analyzing the Performance of Plasmonic Resonators for Dielectric Sensing" @default.
- W3021137886 doi "https://doi.org/10.1063/1.3253899" @default.
- W3021137886 hasPublicationYear "2009" @default.
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