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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2510.07455 |
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| _version_ | 1866911199569903616 |
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| author | Ubachs, Wim Cozijn, Frank M. J. Diouf, Meissa L. Lauzin, Clement Jóźwiak, Hubert Wcisło, Piotr |
| author_facet | Ubachs, Wim Cozijn, Frank M. J. Diouf, Meissa L. Lauzin, Clement Jóźwiak, Hubert Wcisło, Piotr |
| contents | In the early days of laser spectroscopy Letokhov and Chebotayev proposed a scheme for measuring narrow spectral lines where the resolution is not restricted to Doppler effects because the molecules are entrained in a standing-wave light field. Now, such one-dimensional trapping in the intensity maxima of an intracavity field, slightly detuned from resonance, is experimentally demonstrated in the measurement of the very weak S(0) (2-0) quadrupole overtone transition in H$_2$ at 1189 nm. The trapping manifests as an extremely narrow absorption feature at the predicted zero-recoil position, a 70 kHz shift from the blue-recoil component observed in Lamb-dip spectroscopy. A quantitative analysis of the saturation and trapping conditions supports the findings. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_07455 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Letokhov-Chebotayev intracavity trapping spectroscopy of H$_2$ Ubachs, Wim Cozijn, Frank M. J. Diouf, Meissa L. Lauzin, Clement Jóźwiak, Hubert Wcisło, Piotr Atomic Physics In the early days of laser spectroscopy Letokhov and Chebotayev proposed a scheme for measuring narrow spectral lines where the resolution is not restricted to Doppler effects because the molecules are entrained in a standing-wave light field. Now, such one-dimensional trapping in the intensity maxima of an intracavity field, slightly detuned from resonance, is experimentally demonstrated in the measurement of the very weak S(0) (2-0) quadrupole overtone transition in H$_2$ at 1189 nm. The trapping manifests as an extremely narrow absorption feature at the predicted zero-recoil position, a 70 kHz shift from the blue-recoil component observed in Lamb-dip spectroscopy. A quantitative analysis of the saturation and trapping conditions supports the findings. |
| title | Letokhov-Chebotayev intracavity trapping spectroscopy of H$_2$ |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2510.07455 |