Luminescence whispering gallery modes in Ho3+ doped microresonator glasses for temperature sensing
| Autor: | K. Soler-Carracedo, A. Ruiz, F. Lahoz, Inocencio R. Martín |
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| Rok vydání: | 2019 |
| Předmět: |
Microscope
Materials science business.industry Mechanical Engineering Resolution (electron density) Doping Metals and Alloys Physics::Optics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Laser 01 natural sciences 0104 chemical sciences law.invention Mechanics of Materials law Thermal Materials Chemistry Optoelectronics Irradiation Whispering-gallery wave 0210 nano-technology business Luminescence |
| Zdroj: | Journal of Alloys and Compounds. 777:198-203 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.10.297 |
| Popis: | Optical temperature sensors based on the morphology-dependent resonant modes of Ho3+ doped fibers and microspheres were investigated. Luminescent whispering-gallery-modes (WGMs) were detected for both the fibers and the microspheres in a contactless configuration using a modified confocal microscope to excite and detect the Ho3+ luminescence. The WGMs were simulated by numerical solution of the Helmholtz equations and using the geometrical approximation, achieving a good agreement with the experimental results in both cases. A red shift of the spectral position of the WGMs was detected when the microresonators were heated either by contact with a regulated thermal bath or under high power laser irradiation. The thermal resolution of the WGM microresonators was advantageously compared with results reported for other rare-earth doped optical sensors based on the fluorescence intensity ratio technique. |
| Databáze: | OpenAIRE |
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