Excitation of surface plasmons using tilted planar-waveguide Bragg gratings
Excitation of surface plasmons using tilted planar-waveguide Bragg gratings
We present a planar integrated optical surface plasmon refractometer. The fabricated device operates by grating-matched coupling between a core waveguide mode and a set of hybrid plasmon-dielectric modes of a much wider integrated structure. The constructed device incorporates a 50 nm thin gold layer that separates a tilted planar-waveguide Bragg grating and a liquid analyte. It is demonstrated that polarization dependent plasmon anomalies occur in the transmission spectra of the device, which are understood using a numerical Cauchy integral mode solving approach. Sensitivities in this planar integrated device are comparable to existing fiber based plasmonic sensors, but with the advantages of planar integration and microfluidic adaptation.
777-788
Holmes, C.
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Daly, K.R.
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Sparrow, I.J.G.
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Gates, J.C.
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D'Alessandro, G.
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Smith, P.G.R.
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September 2011
Holmes, C.
16306bb8-8a46-4fd7-bb19-a146758e5263
Daly, K.R.
e28b1acf-cdde-4b52-8d83-cf314d7c3466
Sparrow, I.J.G.
3b11b080-98d5-41fe-8e15-bc12d17dc259
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Holmes, C., Daly, K.R., Sparrow, I.J.G., Gates, J.C., D'Alessandro, G. and Smith, P.G.R.
(2011)
Excitation of surface plasmons using tilted planar-waveguide Bragg gratings.
IEEE Photonics Journal, 3 (5), .
(doi:10.1109/JPHOT.2011.2164395).
Abstract
We present a planar integrated optical surface plasmon refractometer. The fabricated device operates by grating-matched coupling between a core waveguide mode and a set of hybrid plasmon-dielectric modes of a much wider integrated structure. The constructed device incorporates a 50 nm thin gold layer that separates a tilted planar-waveguide Bragg grating and a liquid analyte. It is demonstrated that polarization dependent plasmon anomalies occur in the transmission spectra of the device, which are understood using a numerical Cauchy integral mode solving approach. Sensitivities in this planar integrated device are comparable to existing fiber based plasmonic sensors, but with the advantages of planar integration and microfluidic adaptation.
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Published date: September 2011
Organisations:
Optoelectronics Research Centre, Physics & Astronomy, Electronics & Computer Science
Identifiers
Local EPrints ID: 201077
URI: http://eprints.soton.ac.uk/id/eprint/201077
ISSN: 1943-0655
PURE UUID: bbb9ba56-b5cd-426c-9b31-ad4092852415
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Date deposited: 28 Oct 2011 07:56
Last modified: 15 Mar 2024 03:27
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Author:
K.R. Daly
Author:
I.J.G. Sparrow
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