Thermometric absorption spectroscopy through active locking of microbubble resonators

Frontiers in Physics

Physics

Tatyana V. Murzina¹  Guglielmo Vesco²  Daniele Farnesi³  Sonia Centi³  Stefano Pelli³  Gabriele Frigenti³  Fulvio Ratto³  Silvia Soria³  Gualtiero Nunzi Conti³ 

[1] Department of Physics, M. V. Lomonosov Moscow State University, Moscow, Russia;Dipartimento di Fisica, Politecnico di Milano, Milano, Italy;Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Lecco, Italy;Istituto di Fisica Applicata Nello Carrara, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy;

关键词: microbubble resonators;    absorption spectroscopy;    thermometric spectroscopy;    active locking;    gold nanorods;   

DOI  :  10.3389/fphy.2023.1226106

 received in 2023-05-20, accepted in 2023-08-24,  发布年份 2023

来源: Frontiers

【 摘 要 】

We implemented a Microbubble Resonator (MBRs) as an opto-thermal transducer to reconstruct the absorption spectrum of a nanoparticle suspension through its temperature increase. The experimental configuration features the MBR as both the vial containing the suspension and the optical transducer, allowing for a sensitive ultra-compact system with a straightforward microfluidic integration. With respect to a previous publication, the active lock of the MBR resonance produced an order-of-magnitude improvement in the system performance and a smooth absorption reconstruction. Additionally, since the detection process is temperature-based, the measurement is intrinsically insensitive towards scattering spectrum, both of the particles and of the host liquid. These features make the MBR system an interesting candidate for the characterisation of extremely small samples in the context of medical diagnosis from whole biological samples, quality controls for food safety or chemical production processes, and, in general, for the measurement of absorption in opaque mediums.

【 授权许可】

Unknown   
Copyright © 2023 Frigenti, Farnesi, Vesco, Centi, Ratto, Pelli, Murzina, Nunzi Conti and Soria.