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RESEARCH PRODUCT
Intensity-Based Single Particle Plasmon Sensing.
Carsten SönnichsenWeixiang YeKarl WandnerSirin CeliksoyKatharina Kaefersubject
PhysicsScatteringbusiness.industryMechanical EngineeringPhysics::OpticsBioengineering02 engineering and technologyGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsLight scatteringSpectral linesymbols.namesakeWavelengthOpticssymbolsGeneral Materials ScienceRayleigh scattering0210 nano-technologySpectroscopybusinessIntensity (heat transfer)Plasmondescription
Plasmon sensors respond to local changes of their surrounding environment with a shift in their resonance wavelength. This response is usually detected by measuring light scattering spectra to determine the resonance wavelength. However, single wavelength detection has become increasingly important because it simplifies the setup, increases speed, and improves statistics. Therefore, we investigated theoretically how the sensitivity toward such single wavelength scattering intensity changes depend on the material and shape of the plasmonic sensor. Surprisingly, simple equations describe this intensity sensitivity very accurately and allow us to distinguish the various contributions: Rayleigh scattering, dielectric contrast, plasmon shift, and frequency-dependent plasmon bulk damping. We find very good agreement of theoretical predictions and experimental data obtained by single particle spectroscopy.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-02-23 | Nano letters |