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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.13233 |
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| _version_ | 1866917959142735872 |
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| author | Gattinger, Paul Schell, Andreas W. Ramelow, Sven Brandstetter, Markus Zorin, Ivan |
| author_facet | Gattinger, Paul Schell, Andreas W. Ramelow, Sven Brandstetter, Markus Zorin, Ivan |
| contents | Sensing with undetected photons has enabled new, unconventional approaches to Fourier transform infrared (FTIR) spectroscopy. Leveraging properties of non-degenerated entangled photon pairs, mid-IR information can be accessed in the near-IR spectral domain to perform mid-IR spectroscopy with silicon-based detection schemes. Here, we address practical aspects of vibrational spectroscopy with undetected photons using a quantum-FTIR (QFTIR) implementation. The system operates in the spectral range from around $3000~\mathrm{cm}^{-1}$ to $2380~\mathrm{cm}^{-1}$ (detection at around $12500~\mathrm{cm}^{-1}$) and possesses only $68~\mathrm{pW}$ of mid-IR probing power for spectroscopic measurements with a power-dependence of the signal-to-noise ratio of $1.5\cdot 10^{5}~\mathrm{mW}^{-1/2}$. We evaluate the system's short- and long-term stability and experimentally compare it to a commercial FTIR instrument using Allan-Werle plots to benchmark our QFTIR implementation's overall performance and stability. In addition, comparative qualitative spectroscopic measurements of polymer thin films are performed using the QFTIR spectrometer and a commercial FTIR with identical resolution and integration times. Our results show under which conditions QFTIR can practically be competitive or potentially outperform conventional FTIR technology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13233 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum Fourier Transform Infrared Spectroscopy: Evaluation, Benchmarking and Prospects Gattinger, Paul Schell, Andreas W. Ramelow, Sven Brandstetter, Markus Zorin, Ivan Optics Sensing with undetected photons has enabled new, unconventional approaches to Fourier transform infrared (FTIR) spectroscopy. Leveraging properties of non-degenerated entangled photon pairs, mid-IR information can be accessed in the near-IR spectral domain to perform mid-IR spectroscopy with silicon-based detection schemes. Here, we address practical aspects of vibrational spectroscopy with undetected photons using a quantum-FTIR (QFTIR) implementation. The system operates in the spectral range from around $3000~\mathrm{cm}^{-1}$ to $2380~\mathrm{cm}^{-1}$ (detection at around $12500~\mathrm{cm}^{-1}$) and possesses only $68~\mathrm{pW}$ of mid-IR probing power for spectroscopic measurements with a power-dependence of the signal-to-noise ratio of $1.5\cdot 10^{5}~\mathrm{mW}^{-1/2}$. We evaluate the system's short- and long-term stability and experimentally compare it to a commercial FTIR instrument using Allan-Werle plots to benchmark our QFTIR implementation's overall performance and stability. In addition, comparative qualitative spectroscopic measurements of polymer thin films are performed using the QFTIR spectrometer and a commercial FTIR with identical resolution and integration times. Our results show under which conditions QFTIR can practically be competitive or potentially outperform conventional FTIR technology. |
| title | Quantum Fourier Transform Infrared Spectroscopy: Evaluation, Benchmarking and Prospects |
| topic | Optics |
| url | https://arxiv.org/abs/2503.13233 |