$Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets$
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Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets

Among the different types of photonic sensor devices, optical whispering gallery mode resonators (WGMRs) have attracted interest due to their high level of sensitivity, small size, and ability to perform real-time temperature measurements. Here we demonstrate the applicability of temperature measure...

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Autores principales:	Inga Brice, Karlis Grundsteins, Kristians Draguns, Aigars Atvars, Janis Alnis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	PMMA coating refractive index sensing resonance scan method silica microsphere temperature scanning whispering gallery mode resonator (WGMR) Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/0e36b4a440da4b29aeed3d0dcefe9d97
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id	oai:doaj.org-article:0e36b4a440da4b29aeed3d0dcefe9d97
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spelling	oai:doaj.org-article:0e36b4a440da4b29aeed3d0dcefe9d972021-11-11T19:10:31ZWhispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets10.3390/s212171841424-8220https://doaj.org/article/0e36b4a440da4b29aeed3d0dcefe9d972021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7184https://doaj.org/toc/1424-8220Among the different types of photonic sensor devices, optical whispering gallery mode resonators (WGMRs) have attracted interest due to their high level of sensitivity, small size, and ability to perform real-time temperature measurements. Here we demonstrate the applicability of temperature measurements using WGMR in both air and liquid environments. We also show that WGMR allowed measurements of the refractive index variations in an evaporating glucose–water solution droplet. The thermal tuning of WGMR can be reduced by coating WGMRs with a thin layer of polymethyl methacrylate (PMMA). Dip-coating the silica microsphere multiple times significantly reduced the resonance shift, partially compensating for the positive thermo-optical coefficient of silica. The shift direction changed the sign eventually.Inga BriceKarlis GrundsteinsKristians DragunsAigars AtvarsJanis AlnisMDPI AGarticlePMMA coatingrefractive index sensingresonance scan methodsilica microspheretemperature scanningwhispering gallery mode resonator (WGMR)Chemical technologyTP1-1185ENSensors, Vol 21, Iss 7184, p 7184 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	PMMA coating refractive index sensing resonance scan method silica microsphere temperature scanning whispering gallery mode resonator (WGMR) Chemical technology TP1-1185
spellingShingle	PMMA coating refractive index sensing resonance scan method silica microsphere temperature scanning whispering gallery mode resonator (WGMR) Chemical technology TP1-1185 Inga Brice Karlis Grundsteins Kristians Draguns Aigars Atvars Janis Alnis Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets
description	Among the different types of photonic sensor devices, optical whispering gallery mode resonators (WGMRs) have attracted interest due to their high level of sensitivity, small size, and ability to perform real-time temperature measurements. Here we demonstrate the applicability of temperature measurements using WGMR in both air and liquid environments. We also show that WGMR allowed measurements of the refractive index variations in an evaporating glucose–water solution droplet. The thermal tuning of WGMR can be reduced by coating WGMRs with a thin layer of polymethyl methacrylate (PMMA). Dip-coating the silica microsphere multiple times significantly reduced the resonance shift, partially compensating for the positive thermo-optical coefficient of silica. The shift direction changed the sign eventually.
format	article
author	Inga Brice Karlis Grundsteins Kristians Draguns Aigars Atvars Janis Alnis
author_facet	Inga Brice Karlis Grundsteins Kristians Draguns Aigars Atvars Janis Alnis
author_sort	Inga Brice
title	Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets
title_short	Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets
title_full	Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets
title_fullStr	Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets
title_full_unstemmed	Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets
title_sort	whispering gallery mode resonator temperature compensation and refractive index sensing in glucose droplets
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0e36b4a440da4b29aeed3d0dcefe9d97
work_keys_str_mv	AT ingabrice whisperinggallerymoderesonatortemperaturecompensationandrefractiveindexsensinginglucosedroplets AT karlisgrundsteins whisperinggallerymoderesonatortemperaturecompensationandrefractiveindexsensinginglucosedroplets AT kristiansdraguns whisperinggallerymoderesonatortemperaturecompensationandrefractiveindexsensinginglucosedroplets AT aigarsatvars whisperinggallerymoderesonatortemperaturecompensationandrefractiveindexsensinginglucosedroplets AT janisalnis whisperinggallerymoderesonatortemperaturecompensationandrefractiveindexsensinginglucosedroplets
_version_	1718431568142270464

Whispering Gallery Mode Resonator Temperature Compensation and Refractive Index Sensing in Glucose Droplets

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