Sensitivity of silica microspheres modified by xerogel layers to acetone and ethanol

Vlastimil Matějec; Filip Todorov; Michal Jelinek; Martin Fibrich; Miroslav Chomát; Václav Kubeček; Daniela Berková

doi:10.1117/12.886683

6 May 2011 Sensitivity of silica microspheres modified by xerogel layers to acetone and ethanol

Vlastimil Matějec, Filip Todorov, Michal Jelinek, Martin Fibrich, Miroslav Chomát, Václav Kubeček, Daniela Berková

Proceedings Volume 8073, Optical Sensors 2011; and Photonic Crystal Fibers V; 80730X (2011) https://doi.org/10.1117/12.886683
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

The paper deals with the preparation and characterization of whispering-gallery-mode silica spherical microresonators and with effects of liquid acetone, ethanol, and xerogel layers applied onto these microresonators on their resonance spectra. Microrespheres with diameters ranging from 320 to 360 μm have been prepared by heating a tip of a silica fiber with a hydrogen-oxygen burner. The microspheres were excited by a fiber taper or a bulk prism and their resonance spectra were measured. Values of the Q factor from 10⁴ to 10⁶ have been determined from these spectra. In experiments, it has been found that short contact of microspheres with acetone causes a shift of resonance dips due to surface effects caused by acetone. A decrease of the Q factor has been observed with a microresonator onto which a xerogel silica layer was applied by the sol-gel method. A very high decrease of the Q factor has been observed when the silica microresonator was brought in contact with liquid ethanol.

Citation Download Citation

Vlastimil Matějec, Filip Todorov, Michal Jelinek, Martin Fibrich, Miroslav Chomát, Václav Kubeček, and Daniela Berková "Sensitivity of silica microspheres modified by xerogel layers to acetone and ethanol", Proc. SPIE 8073, Optical Sensors 2011; and Photonic Crystal Fibers V, 80730X (6 May 2011); https://doi.org/10.1117/12.886683

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