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 Stor Fis, I-00184 Rome, Italy; Ctr Studi & Ric Enrico Fermi, I-00184 Rome, Italy; CNR, IFAC, Ist Fis Applicata Nello Carrara, I-50019 Sesto Fiorentino, Italy; CNR, INO, I-50125 Florence, 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

More Information: The authors wish to acknowledge the financial support of the Ministero dell’Istruzione, dell’Universita e della Ricerca (MIUR) through the Centro Fermi project Premiale 2012 – Fisica e strumentazione per la salute dell’uomo and Futuro in Ricerca (FIR) programme – grant N. RBFR122KL1 (SENS4BIO). S. Berneschi wishes to thank MIUR for its support through PRIN 2010-2011 Project ARTEMIDE (ref. 20108ZSRTR).
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: 30
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