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

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.

Kategori

Vitenskapelig artikkel

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

2013

Publisert i

Optics Express

ISSN

1094-4087

Forlag

Optical Society of America

Årgang

21

Hefte nr.

25

Side(r)

31375 - 31389

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