All-Optical Photoacoustic Sensing with Hollow Microresonators
| Autor: | Silvia Soria, Alberto Fernández-Bienes, Stefano Pelli, Lucia Cavigli, Sonia Centi, T. García-Fernández, Fulvio Ratto, Gualtiero Nunzi Conti, Gabriele Frigenti |
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| Rok vydání: | 2020 |
| Předmět: |
0303 health sciences
Plasmonic nanoparticles Materials science business.industry Capillary action Microfluidics 02 engineering and technology 021001 nanoscience & nanotechnology 03 medical and health sciences Resonator Modulation Optoelectronics Nanorod Ultrasonic sensor Whispering-gallery wave 0210 nano-technology business 030304 developmental biology |
| Zdroj: | ICTON |
| Popis: | We developed an all-optical photoacoustic (PA) sensing platform based on whispering gallery mode (WGM) hollow resonators able to detect plasmonic nanoparticles in microfluidics. A silica microbubble resonator (MBR) made on a capillary and exhibiting high optical and mechanical Q factors acts as a unique ultrasound transducer for photoacoustic characterization of metallic nanoparticles. The system was tested with gold nanorods (GNR) placed inside the MBR and acoustic detection was achieved by monitoring the enhanced modulation of the optical resonances at the microbubble mechanical eigenfrequencies. |
| Databáze: | OpenAIRE |
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