Confocal reflectance microscopy for determination of microbubble resonator thickness

Year: 2015

Authors: Cosci A., Quercioli F., Farnesi D., Berneschi S., Giannetti A., Cosi F., Barucci A., Conti G.N., Righini G., Pelli S.

Autors Affiliation: Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Piazza del Viminale 1, Rome, 00184, Italy; IFAC-CNR, Istituto di Fisica Applicata Nello Carrara, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, Sesto Fiorentino, 50019, Italy; INO-CNR, Istituto Nazionale di Ottica Consiglio Nazionale delle Ricerche, Largo Enrico Fermi 6, Arcetri-Firenze, 50125, Italy

Abstract: Optical Micro Bubble Resonators (OMBR) are emerging as new type of sensors characterized by high Q-factor and embedded micro-fluidic. Sensitivity is related to cavity field penetration and, therefore, to the resonator thickness. At the state of the art, methods for OMBR\’s wall thickness evaluation rely only on a theoretical approach. The purpose of this study is to create a non-destructive method for measuring the shell thickness of a microbubble using reflectance confocal microscopy. The method was validated through measurements on etched capillaries with different thickness and finally it was applied on microbubble resonators.

Journal/Review: OPTICS EXPRESS

Volume: 23 (13)      Pages from: 16693  to: 16701

KeyWords: Nondestructive examination; Q factor measurement; Reflection; Resonators, Confocal reflectance microscopies; Different thickness; Microbubble resonators; Nondestructive methods; Reflectance confocal microscopies; Shell thickness; State of the art; Theoretical approach, Bubbles (in fluids)
DOI: 10.1364/OE.23.016693

Citations: 28
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