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Optofluidic integrated Bragg grating chemical sensor: Utilising a sodium-elective receptor surface to enhance detection

Optofluidic integrated Bragg grating chemical sensor: Utilising a sodium-elective receptor surface to enhance detection
Optofluidic integrated Bragg grating chemical sensor: Utilising a sodium-elective receptor surface to enhance detection
Planar waveguides can be written with a UV-laser into photosensitised silica to produce a wide range of optical devices. Careful modulation of two interfering beams allows Bragg gratings to be directly written into the channel. These Bragg gratings are inherently sensitive to temperature and strain, however etching away the surface exposes the mode within the grating to its surroundings. The corresponding observed shift in Bragg wavelength can be used to detect changes in this environment [1]. It has been previously reported [2] that the sensitivity of such a refractometer can be enhanced by over an order of magnitude through use of a high-index overlayer of tantalum pentoxide. This enhanced sensor has shown the potential to detect a single molecular monolayer upon the sensor surface [2]. This sensitivity was confirmed through the successful attachment and detection of a single molecular monolayer of a fluorescein-based organic dye to the sensor surface [3]
Parker, R.M.
b052ca4d-b6c7-4fdd-a2f9-45032f0ff13f
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Grossel, M.C.
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Parker, R.M.
b052ca4d-b6c7-4fdd-a2f9-45032f0ff13f
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Grossel, M.C.
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Parker, R.M., Gates, J.C., Grossel, M.C. and Smith, P.G.R. (2011) Optofluidic integrated Bragg grating chemical sensor: Utilising a sodium-elective receptor surface to enhance detection. European Conference on Lasers and Electro-Optics, Munich, Germany. 22 - 26 May 2011. (doi:10.1109/CLEOE.2011.5943054).

Record type: Conference or Workshop Item (Paper)

Abstract

Planar waveguides can be written with a UV-laser into photosensitised silica to produce a wide range of optical devices. Careful modulation of two interfering beams allows Bragg gratings to be directly written into the channel. These Bragg gratings are inherently sensitive to temperature and strain, however etching away the surface exposes the mode within the grating to its surroundings. The corresponding observed shift in Bragg wavelength can be used to detect changes in this environment [1]. It has been previously reported [2] that the sensitivity of such a refractometer can be enhanced by over an order of magnitude through use of a high-index overlayer of tantalum pentoxide. This enhanced sensor has shown the potential to detect a single molecular monolayer upon the sensor surface [2]. This sensitivity was confirmed through the successful attachment and detection of a single molecular monolayer of a fluorescein-based organic dye to the sensor surface [3]

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e-pub ahead of print date: 2011
Venue - Dates: European Conference on Lasers and Electro-Optics, Munich, Germany, 2011-05-22 - 2011-05-26
Organisations: Optoelectronics Research Centre, Chemistry

Identifiers

Local EPrints ID: 341434
URI: https://eprints.soton.ac.uk/id/eprint/341434
PURE UUID: a9c123f0-9448-4d0f-80e9-238ddc235888
ORCID for J.C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for M.C. Grossel: ORCID iD orcid.org/0000-0001-7469-6854
ORCID for P.G.R. Smith: ORCID iD orcid.org/0000-0003-0319-718X

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Date deposited: 25 Jul 2012 08:53
Last modified: 17 Oct 2019 00:38

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