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.
|Title of host publication||2018 20th International Conference on Transparent Optical Networks, ICTON 2018|
|Publication status||Published - 26 Sept 2018|
|Event||20th International Conference on Transparent Optical Networks, ICTON 2018 - Bucharest, Romania|
Duration: 1 Jul 2018 → 5 Jul 2018
Conference number: 20
|Name||International Conference on Transparent Optical Networks|
|Conference||20th International Conference on Transparent Optical Networks, ICTON 2018|
|Abbreviated title||ICTON 2018|
|Period||1/07/18 → 5/07/18|
- aluminium oxide
- optical sensing.