Abstract
The Al2O3 waveguide technology was explored for sensing applications. Passive microring resonators with a quality factor in air of 3.2×105 were developed with a bulk refractive index sensitivity of ~100 nm/RIU and limit of detection of ~10-6 RIU. These were functionalized to detect the biomarker rhS100A4 from urine down to concentrations of 3 nM. Furthermore, Al2O3:Yb3+ microdisk lasers were realized that exhibited single mode lasing operation in water. Their lasing wavelength was tuned by varying the bulk refractive index and a bulk refractive index sensitivity of ~20 nm/RIU with a LOD of ~3×10-6 was achieved.
Original language | English |
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Title of host publication | Optical Sensors, Sensors 2018 |
Publisher | Optical Society of America |
Pages | SeTu4E.1 |
Volume | Part F110-Sensors 2018 |
ISBN (Electronic) | 9781557528209 |
ISBN (Print) | 978-1-943580-43-9 |
DOIs | |
Publication status | Published - 1 Jan 2018 |
Event | Optical Sensors 2018 - Zurich, Switzerland Duration: 2 Jul 2018 → 5 Jul 2018 |
Conference
Conference | Optical Sensors 2018 |
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Country/Territory | Switzerland |
City | Zurich |
Period | 2/07/18 → 5/07/18 |
Keywords
- Diode pumped lasers
- Distributed feedback lasers
- Microdisk lasers
- Optical pumping
- Refractive index
- Sensor performance