Infrared absorption spectroscopy of a single polyatomic molecular ion
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918531543597056 |
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| author | Wu, Zhenlin Duka, Tim Isaza-Monsalve, Mariano Kautzky, Miriam Švarc, Vojtěch Turci, Andrea Nardi, René Gronowski, Marcin Tomza, Michał Furey, Brandon J. Schindler, Philipp |
| author_facet | Wu, Zhenlin Duka, Tim Isaza-Monsalve, Mariano Kautzky, Miriam Švarc, Vojtěch Turci, Andrea Nardi, René Gronowski, Marcin Tomza, Michał Furey, Brandon J. Schindler, Philipp |
| contents | Absorption spectroscopy is a fundamental tool for probing molecular structure. However, performing absorption spectroscopy on individual molecules is challenging due to the low signal-to-noise ratio. Here, we report on a nondestructive absorption spectroscopy on a mid-infrared vibrational transition in a single molecular ion that is co-trapped with an atomic ion. The absorption of a single photon is detected via the momentum transfer from the absorbed photon onto the molecule. This recoil signal is amplified using a non-classical state of motion of the two-ion crystal and subsequently read out via the atomic ion. We characterize the recoil detection method and use it to investigate the interaction between femtosecond laser pulses and the O-H stretching vibration in individual CaOH+ molecular ions. Furthermore, we present the single-photon absorption spectrum obtained for the vibrational transition. This method represents a milestone towards quantum non-demolition measurements of complex polyatomic molecules, providing high-fidelity methods for preparation and measurement of the quantum state of a wide range of molecular species. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_19687 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Infrared absorption spectroscopy of a single polyatomic molecular ion Wu, Zhenlin Duka, Tim Isaza-Monsalve, Mariano Kautzky, Miriam Švarc, Vojtěch Turci, Andrea Nardi, René Gronowski, Marcin Tomza, Michał Furey, Brandon J. Schindler, Philipp Quantum Physics Atomic Physics Absorption spectroscopy is a fundamental tool for probing molecular structure. However, performing absorption spectroscopy on individual molecules is challenging due to the low signal-to-noise ratio. Here, we report on a nondestructive absorption spectroscopy on a mid-infrared vibrational transition in a single molecular ion that is co-trapped with an atomic ion. The absorption of a single photon is detected via the momentum transfer from the absorbed photon onto the molecule. This recoil signal is amplified using a non-classical state of motion of the two-ion crystal and subsequently read out via the atomic ion. We characterize the recoil detection method and use it to investigate the interaction between femtosecond laser pulses and the O-H stretching vibration in individual CaOH+ molecular ions. Furthermore, we present the single-photon absorption spectrum obtained for the vibrational transition. This method represents a milestone towards quantum non-demolition measurements of complex polyatomic molecules, providing high-fidelity methods for preparation and measurement of the quantum state of a wide range of molecular species. |
| title | Infrared absorption spectroscopy of a single polyatomic molecular ion |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2511.19687 |