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dc.contributor.authorRacz, GZ
dc.contributor.authorBamiedakis, Nikolaos
dc.contributor.authorPenty, Richard
dc.date.accessioned2015-06-01T11:09:27Z
dc.date.available2015-06-01T11:09:27Z
dc.date.issued2015-09-01
dc.identifier.citationSensors and Actuators A: Physical, Volume 233, 1 September 2015, Pages 91–97. DOI: 10.1016/j.sna.2015.04.009
dc.identifier.isbn9781557528209
dc.identifier.issn0924-4247
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/248120
dc.description.abstractMeasuring a single analyte in a highly absorptive microfluidic channel has always been a challenge. Even with a highly selective sensing layer, other chemical species can affect the interrogation of the analyte. Matching the evanescent tail with the sensing layer thickness is difficult in case of evanescent field sensing. The tail typically extends beyond the sensing layer, introducing noise and spurious errors in the measurement, which scales up with analyte concentration. In this work therefore, we propose the use of a simple multimode evanescent waveguide sensor that eliminates such common spurious effects. The proposed mode-selective sensing system exploits the sensitivity differences between the different guided modes in detecting the effects of the outer medium in the sensor response. The operation of the sensor device relies on the use of an asymmetric waveguide junction, which enable efficient separation of waveguide modes and therefore detection of their differences in behaviour. The proposed device is shown through simulations to achieve very small estimation errors below 5%, even for very high absorption coefficients of the outer medium of up to 80 times larger than that of the sensing layer.
dc.description.sponsorshipThis work is funded by EPSRC UK.
dc.languageEnglish
dc.language.isoen
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivs 2.0 UK: England & Wales
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.0/uk/
dc.titleMode-selective sensing using asymmetric waveguide junctions
dc.typeConference Object
dc.description.versionThis is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.sna.2015.04.009
prism.endingPage97
prism.publicationDate2015
prism.publicationNameNonlinear Photonics, NP 2014
prism.startingPage91
prism.volume233
dc.rioxxterms.funderEPSRC
rioxxterms.versionofrecord10.1016/j.sna.2015.04.009
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2015-06-01
dc.contributor.orcidBamiedakis, Nikolaos [0000-0003-1981-1623]
dc.contributor.orcidPenty, Richard [0000-0003-4605-1455]
rioxxterms.typeConference Paper/Proceeding/Abstract


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Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales