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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2511.04532 |
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| _version_ | 1866909890670231552 |
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| author | Gabbrielli, Tecla Pelini, Jacopo Zhang, Chenhong Cappelli, Francesco de Cumis, Mario Siciliani Russo, Stefano Dello Canino, Maria Concetta Roncaglia, Alberto De Natale, Paolo Borri, Simone |
| author_facet | Gabbrielli, Tecla Pelini, Jacopo Zhang, Chenhong Cappelli, Francesco de Cumis, Mario Siciliani Russo, Stefano Dello Canino, Maria Concetta Roncaglia, Alberto De Natale, Paolo Borri, Simone |
| contents | Versatile, ultracompact, easy-to-handle, high-sensitivity sensors are compelling tools for in situ pivotal applications, such as medical diagnostics, security and safety assessments, and environmental control. In this work, we combine photoacoustic spectroscopy and feedback interferometry, proposing a novel trace-gas sensor equipped with a self-mixing readout. This scheme demonstrates a readout sensitivity comparable to that of bulkier state-of-the-art balanced Michelson-interferometric schemes, achieving the same spectroscopic performance in terms of signal-to-noise ratio (SNR) and minimum detection limit (MDL). At the same time, the self-mixing readout benefits from a reduced size and a lower baseline, paving the way for future system downsizing and integration while offering a higher detectability for lower gas concentrations. Moreover, the intrinsic wavelength independence of both self-mixing and photoacoustic techniques allows the applicability and tailorability of the sensor to any desired spectral range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_04532 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Self-mixing-based photoacoustic sensing Gabbrielli, Tecla Pelini, Jacopo Zhang, Chenhong Cappelli, Francesco de Cumis, Mario Siciliani Russo, Stefano Dello Canino, Maria Concetta Roncaglia, Alberto De Natale, Paolo Borri, Simone Applied Physics Versatile, ultracompact, easy-to-handle, high-sensitivity sensors are compelling tools for in situ pivotal applications, such as medical diagnostics, security and safety assessments, and environmental control. In this work, we combine photoacoustic spectroscopy and feedback interferometry, proposing a novel trace-gas sensor equipped with a self-mixing readout. This scheme demonstrates a readout sensitivity comparable to that of bulkier state-of-the-art balanced Michelson-interferometric schemes, achieving the same spectroscopic performance in terms of signal-to-noise ratio (SNR) and minimum detection limit (MDL). At the same time, the self-mixing readout benefits from a reduced size and a lower baseline, paving the way for future system downsizing and integration while offering a higher detectability for lower gas concentrations. Moreover, the intrinsic wavelength independence of both self-mixing and photoacoustic techniques allows the applicability and tailorability of the sensor to any desired spectral range. |
| title | Self-mixing-based photoacoustic sensing |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2511.04532 |