Resonant Microbubble as a Microfluidic Stage for All-Optical Photoacoustic Sensing
| Autor: | Gualtiero Nunzi Conti, T. García-Fernández, Fulvio Ratto, Silvia Soria, Lucia Cavigli, Sonia Centi, Gabriele Frigenti, Alberto Fernández-Bienes |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Transient deformation Oscillation business.industry Physics::Medical Physics Microfluidics Physics::Optics General Physics and Astronomy Photoacoustic imaging in biomedicine 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences law.invention Physics::Fluid Dynamics Resonator All optical law 0103 physical sciences Optoelectronics microresonator 010306 general physics 0210 nano-technology business Cavity wall |
| Zdroj: | Physical Review Applied 12 (2019). doi:10.1103/PhysRevApplied.12.014062 info:cnr-pdr/source/autori:Frigenti, Gabriele; Cavigli, Lucia; Fernandez-Bienes, Alberto; Ratto, Fulvio; Centi, Sonia; Garcia-Fernandez, Tupak; Conti, Gualtiero Nunzi; Soria, Silvia/titolo:Resonant Microbubble as a Microfluidic Stage for All-Optical Photoacoustic Sensing/doi:10.1103%2FPhysRevApplied.12.014062/rivista:Physical Review Applied/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:12 |
| Popis: | We implement a whispering-gallery-mode microbubble resonator (MBR) as a multifunctional component for all-optical photoacoustic inspection of materials in a platform combining microfluidic design and high sensitivity to spectral absorbance. In our setup, the MBR acts both as the acoustic transducer and as the vial for a sample causing the photoacoustic event, thus dictating its operational frequency and removing any need for impedance-matching media. We challenge our setup in the assessment of the photostability of gold nanorods to demonstrate its validity. We develop a numerical model to qualitatively interpret the experimental signal as a transient shift of the resonance condition of the MBR. Possible implementations of the MBR in photoacoustic sensors are discussed. |
| Databáze: | OpenAIRE |
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