High-performance cavity-enhanced photoacoustic trace-gas sensing

Jacopo Pelini; Mario Siciliani de Cumis; Zhen Wang; Stefano Dello Russo; Iacopo Galli; Inaki Lopez Garcia; Maria Concetta Canino; Alberto Roncaglia; Pablo Cancio Pastor; Naota Akikusa; Wei Ren; Paolo De Natale; Simone Borri

doi:10.1117/12.3002523

8 March 2024 High-performance cavity-enhanced photoacoustic trace-gas sensing

Jacopo Pelini, Mario Siciliani de Cumis, Zhen Wang, Stefano Dello Russo, Iacopo Galli, Inaki Lopez Garcia, Maria Concetta Canino, Alberto Roncaglia, Pablo Cancio Pastor, Naota Akikusa, Wei Ren, Paolo De Natale, Simone Borri

Author Affiliations +

Proceedings Volume 12895, Quantum Sensing and Nano Electronics and Photonics XX; 128950A (2024) https://doi.org/10.1117/12.3002523
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

In the race toward increasingly high-performance trace-molecule sensors, one of the most significant steps forward in the last decade for photoacoustic sensors was their combination with high-finesse optical cavities. Validated with different configurations, this technique demonstrated enhanced sensitivities below the part-per-trillion level (ppt) and record dynamic ranges. Here we present our advanced cantilever-based photoacoustic setup, based on a custom-made silicon cantilever embedded in a doubly-resonant configuration. The combination of a high-quality-factor acoustic resonator and a high-finesse optical cavity allows a final sensitivity enhancement by several orders of magnitude. The sensor was tested on strong N₂O transitions around 4.5 μm wavelength with a continuous-wave quantum cascade laser.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jacopo Pelini, Mario Siciliani de Cumis, Zhen Wang, Stefano Dello Russo, Iacopo Galli, Inaki Lopez Garcia, Maria Concetta Canino, Alberto Roncaglia, Pablo Cancio Pastor, Naota Akikusa, Wei Ren, Paolo De Natale, and Simone Borri "High-performance cavity-enhanced photoacoustic trace-gas sensing", Proc. SPIE 12895, Quantum Sensing and Nano Electronics and Photonics XX, 128950A (8 March 2024); https://doi.org/10.1117/12.3002523

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