Al2O3 Microresonator Based Passive and Active Biosensors

Michiel De Goede, Lantian Chang, Meindert Dijkstra, Raquel Obregon, Javier Ramon-Azcon, Elena Martinez, Laura Padilla, Jaume Adan, Francesc Mitjans, Sonia M. Garcia-Blanco

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

1 Citation (Scopus)
60 Downloads (Pure)

Abstract

Al2O3 microresonators were realized for sensing applications of both passive and active devices. Passive microring resonators exhibited quality factors up to 3.2×105 in air. A bulk refractive index sensitivity of 100 nm/RIU was demonstrated together with a limit of detection of 10-6 RIU. Functionalizing their surface allowed for the label-free detection of the biomarker rhS100A4 from urine with a limit of detection of 3 nM. Furthermore, single-mode Al2O3:Yb3+ microdisk lasers were realized that could operate in an aqueous environment. Upon varying the bulk refractive index their lasing wavelength could be tuned with a sensitivity of 20 nm/RIU and a LOD of 3×10-6 RIU.

Original languageEnglish
Title of host publication2018 20th International Conference on Transparent Optical Networks, ICTON 2018
PublisherIEEE Computer Society
Volume2018-July
ISBN (Electronic)9781538666043
ISBN (Print)9781538666043
DOIs
Publication statusPublished - 26 Sep 2018
Event20th International Conference on Transparent Optical Networks, ICTON 2018 - Bucharest, Romania
Duration: 1 Jul 20185 Jul 2018
Conference number: 20

Publication series

NameInternational Conference on Transparent Optical Networks
Volume2018-July

Conference

Conference20th International Conference on Transparent Optical Networks, ICTON 2018
Abbreviated titleICTON 2018
CountryRomania
CityBucharest
Period1/07/185/07/18

Keywords

  • aluminium oxide
  • microresonator
  • optical sensing.
  • ytterbium

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