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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 10 — Oct. 1, 2007
  • pp: 2696–2701

Theoretical model of a planar integrated refractive index sensor based on surface plasmon–polariton excitation with a long period grating

Galina Nemova and Raman Kashyap  »View Author Affiliations

JOSA B, Vol. 24, Issue 10, pp. 2696-2701 (2007)

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A theoretical model of a new integrated planar surface plasmon–polariton (SPP) refractive index sensor with a long period grating (LPG) is presented and comprehensively investigated. The main principle of operation of this device is based on high-efficiency energy transfer between a p-polarized guided mode propagating in a waveguide layer of the structure and copropagating SPP supported by a metal layer separated from the waveguide layer by a buffer. The high-efficiency energy transfer is realized by means of a properly designed LPG imprinted in the waveguide and buffer layers. This device is compact and free from any moving parts and can be easily integrated into any planar scheme. Our simulations are based on the coupled-mode theory and done at the well-developed and commercialized telecom wavelengths in the 1500 nm window.

© 2007 Optical Society of America

OCIS Codes
(230.7390) Optical devices : Waveguides, planar
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Integrated Optics

Original Manuscript: March 9, 2007
Revised Manuscript: July 5, 2007
Manuscript Accepted: July 16, 2007
Published: September 21, 2007

Galina Nemova and Raman Kashyap, "Theoretical model of a planar integrated refractive index sensor based on surface plasmon-polariton excitation with a long period grating," J. Opt. Soc. Am. B 24, 2696-2701 (2007)

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