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Detection of single nano-defects in photonic crystals between crossed polarizers

Detection of single nano-defects in photonic crystals between crossed polarizers

Kategori
Vitenskapelig artikkel
Sammendrag
We investigate, by simulations and experiments, the light scattering of small particles trapped in photonic crystal membranes supporting guided resonance modes. Our results show that, due to amplified Rayleigh small particle scattering, such membranes can be utilized to make a sensor that can detect single nano-particles. We have designed a biomolecule sensor that uses cross-polarized excitation and detection for increased sensitivity. Estimated using Rayleigh scattering theory and simulation results, the current fabricated sensor has a detection limit of 26 nm, corresponding to the size of a single virus. The sensor can potentially be made both cheap and compact, to facilitate use at point-of-care.
Språk
Engelsk
Forfatter(e)
  • Jon Olav Grepstad
  • Peter Kaspar
  • Ib-Rune Johansen
  • Olav Solgaard
  • Aasmund Sudbø
Institusjon(er)
  • Norges teknisk-naturvitenskapelige universitet
  • CEA-Leti
  • SINTEF Digital / Microsystems and Nanotechnology
  • Stanford University
  • Universitetet i Oslo
År
Publisert i
Optics Express
ISSN
1094-4087
Årgang
21
Hefte nr.
25
Side(r)
31375 - 31389