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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 4 — Apr. 1, 2011
  • pp: 671–678

Effect of the cladding layer on resonance response in guided mode resonance structures and its sensing applications

Sakoolkan Boonruang and Waleed S. Mohammed  »View Author Affiliations


JOSA B, Vol. 28, Issue 4, pp. 671-678 (2011)
http://dx.doi.org/10.1364/JOSAB.28.000671


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Abstract

The resonance properties in a guided mode resonance (GMR) structure having a cladding layer inserted between the subwavelength grating and the high-index film are studied. The presence of the layer results in a significant reduction of the resonance linewidth where multiple-coupling approximations are implemented to describe this behavior. The sensitivity of the resonance wavelength to the change of the layer’s refractive index demonstrates the feasibility of using this configuration as a high resolution GMR-based sensor (up to 1 × 10 5 refractive index unit). The improvement is achieved through the waveguide properties with no perturbation of the grating param eters. In this scheme, coupling to a cladding mode increases the sensitivity 32 times that of coupling to a guided mode when using high-index substances. For low-index substances, exciting super mode resonances enhances the sensitivity by a factor of 6 compared to the guided-mode resonance.

© 2011 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(130.5296) Integrated optics : Photonic crystal waveguides
(050.6624) Diffraction and gratings : Subwavelength structures
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Integrated Optics

History
Original Manuscript: November 4, 2010
Revised Manuscript: January 20, 2011
Manuscript Accepted: January 30, 2011
Published: March 10, 2011

Citation
Sakoolkan Boonruang and Waleed S. Mohammed, "Effect of the cladding layer on resonance response in guided mode resonance structures and its sensing applications," J. Opt. Soc. Am. B 28, 671-678 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-4-671

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