基于二硫化钨增敏的锥形光纤表面等离子体共振传感器（英文）-豆柴文库

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基于二硫化钨增敏的锥形光纤表面等离子体共振传感器（英文）
Title:TaperedOpticalFiberSurfacePlasmonResonanceSensorEnhancedbyTungstenDisulfideSensitization
Abstract:
Surfaceplasmonresonance(SPR)sensorshavegainedsignificantattentioninrecentyearsduetotheirhighsensitivity,real-timemonitoringcapabilities,andlabel-freedetection.Inthispaper,weproposeandinvestigateanoveltypeofSPRsensorbasedonataperedopticalfiberandsensitizedwithtungstendisulfide(WS2).TheWS2materialisknownforitsuniqueoptoelectronicpropertiesandisexpectedtoenhancethesensor'ssensitivity.Thefabricatedsensordemonstratesimprovedperformanceandofferspotentialapplicationsinvariousfieldsincludingbiomedicalsensing,environmentalmonitoring,andchemicalanalysis.Thispaperprovidesacomprehensiveanalysisofthesensor'sdesign,fabricationprocess,sensitivityimprovement,andpotentialapplications.
1.Introduction
Surfaceplasmonresonance(SPR)sensingtechniqueshaverevolutionizedthefieldofchemicalandbio-sensingduetotheirlabel-free,real-timemonitoringcapabilities.TraditionalSPRsensorsaretypicallybasedonaprismorgrating-coupledconfiguration,whichlimitstheirintegrationcapabilitiesandscalability.Recently,SPRsensorsbasedonopticalfiberplatformshaveemergedasapromisingalternative.Amongthese,taperedopticalfibershaveattractedsignificantattentionduetotheirabilitytoconfinelightinasubwavelengthregion,thusenablingefficientexcitationofsurfaceplasmons.ThispaperpresentsanoveldesignofanSPRsensorbasedonataperedopticalfiberandsensitizedwithWS2.
2.SensorDesignandFabrication
TheproposedsensorconsistsofataperedopticalfiberwithathinlayerofWS2depositedonitssurface.Thetaperedregionofthefiberactsasasensingelement,whereachangeinrefractiveindexduetothebindingofanalytescausesashiftintheSPRwavelength.Thefabricationprocessinvolvestaperingastandardopticalfiberusingafusiontaperingtechnique,followedbyacontrolleddepositionofWS2onthetaperedregion.ThesensordimensionsandWS2coatingthicknessareoptimizedthroughsimulationsandexperimentalcharacterizationtoachievethedesiredsensitivity.
3.SensitivityEnhancementMech