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Proceedings Article

Guided-mode resonance sensor with extended spatial sensitivity

[+] Author Affiliations
David Fattal, Mike Sigalas, Zhiyong Li, Raymond G. Beausoleil

Hewlett-Packard Labs.

Anna Pyayt

Hewlett-Packard Labs. and Univ. of Washington

Proc. SPIE 6766, Optoelectronic Devices: Physics, Fabrication, and Application IV, 67660J (September 25, 2007); doi:10.1117/12.731942
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From Conference Volume 6766

  • Optoelectronic Devices: Physics, Fabrication, and Application IV
  • Joachim Piprek; Jian J. Wang
  • Boston, MA | September 09, 2007

abstract

We propose a novel design for a guided-mode resonance (GMR) grating sensor that extends the sensitivity to a large region of space, possibly several tens of microns away from the grating surface. This type of sensors has high sensitivity in the half-space above the grating, close to the theoretical limit, together with a controllable - potentially very high - quality factor. It relies on a resonance caused by a "confined" mode of a sub-wavelength thick grating slab, a mode that is largely expelled from the grating itself into the grating environment. The small thickness assumption allows us to derive a simple yet accurate analytical model for the sensor behavior, which is tested numerically using a rigorous coupled-wave analysis (RCWA) method as well as in preliminary grating transmission measurements.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Topics

Sensors
Citation

David Fattal ; Mike Sigalas ; Anna Pyayt ; Zhiyong Li and Raymond G. Beausoleil
"Guided-mode resonance sensor with extended spatial sensitivity", Proc. SPIE 6766, Optoelectronic Devices: Physics, Fabrication, and Application IV, 67660J (September 25, 2007); doi:10.1117/12.731942; http://dx.doi.org/10.1117/12.731942


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