Singlet pathway to the ground state of ultracold polar molecules
We demonstrate a two-photon pathway to the ground state of 6Li40K molecules that involves only singlet-to-singlet optical transitions. We start from a molecular state which contains a significant admixture from the singlet ground state potential by selecting the Feshbach resonance for molecule assoc...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/144290 |
| _version_ | 1811694312005566464 |
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| author | Yang, A. Botsi, S. Kumar, S. Pal, S. B. Lam, M. Čepaitė, I Laugharn, A. Dieckmann, K. |
| author2 | Asian Spectroscopy Conference 2020 |
| author_facet | Asian Spectroscopy Conference 2020 Yang, A. Botsi, S. Kumar, S. Pal, S. B. Lam, M. Čepaitė, I Laugharn, A. Dieckmann, K. |
| author_sort | Yang, A. |
| collection | NTU |
| description | We demonstrate a two-photon pathway to the ground state of 6Li40K molecules that involves only singlet-to-singlet optical transitions. We start from a molecular state which contains a significant admixture from the singlet ground state potential by selecting the Feshbach resonance for molecule association. With the only contributing singlet state to the molecular state being fully stretched and with control over the lasers polarization we address a sole hyperfine component of the excited A1Σ+ potential without resolving its hyperfine structure. This scheme ensures access to only one ground state hyperfine component with sufficient Franck-Condon factors and moderate laser powers for both coupling transitions. Its implementation results in large and balanced Rabi frequencies, a favourable condition for the coherent transfer to the ground state. We perform dark resonance spectroscopy to precisely determine the transition frequencies of the states involved. The strong dipolar nature of 6Li40K is revealed by Stark spectroscopy, as it is necessary for the study of dipolar interactions in an optical lattice. |
| first_indexed | 2024-10-01T07:05:34Z |
| format | Conference Paper |
| id | ntu-10356/144290 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:05:34Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1442902020-10-29T20:12:09Z Singlet pathway to the ground state of ultracold polar molecules Yang, A. Botsi, S. Kumar, S. Pal, S. B. Lam, M. Čepaitė, I Laugharn, A. Dieckmann, K. Asian Spectroscopy Conference 2020 Institute of Advanced Studies Science::Chemistry Ultracold Molecules Molecular Spectroscopy We demonstrate a two-photon pathway to the ground state of 6Li40K molecules that involves only singlet-to-singlet optical transitions. We start from a molecular state which contains a significant admixture from the singlet ground state potential by selecting the Feshbach resonance for molecule association. With the only contributing singlet state to the molecular state being fully stretched and with control over the lasers polarization we address a sole hyperfine component of the excited A1Σ+ potential without resolving its hyperfine structure. This scheme ensures access to only one ground state hyperfine component with sufficient Franck-Condon factors and moderate laser powers for both coupling transitions. Its implementation results in large and balanced Rabi frequencies, a favourable condition for the coherent transfer to the ground state. We perform dark resonance spectroscopy to precisely determine the transition frequencies of the states involved. The strong dipolar nature of 6Li40K is revealed by Stark spectroscopy, as it is necessary for the study of dipolar interactions in an optical lattice. Published version 2020-10-27T03:01:23Z 2020-10-27T03:01:23Z 2020 Conference Paper Yang, A., Botsi, S., Kumar, S., Pal, S. B., Lam M., Čepaitė, I., ... Dieckmann, K. (2020). Singlet pathway to the ground state of ultracold polar molecules. Proc. Of the 7th Asian Spectroscopy Conference (ASC 2020). doi:10.32655/ASC_8-10_Dec2020.28 https://hdl.handle.net/10356/144290 10.32655/ASC_8-10_Dec2020.28 en © 2020 Nanyang Technological University. application/pdf |
| spellingShingle | Science::Chemistry Ultracold Molecules Molecular Spectroscopy Yang, A. Botsi, S. Kumar, S. Pal, S. B. Lam, M. Čepaitė, I Laugharn, A. Dieckmann, K. Singlet pathway to the ground state of ultracold polar molecules |
| title | Singlet pathway to the ground state of ultracold polar molecules |
| title_full | Singlet pathway to the ground state of ultracold polar molecules |
| title_fullStr | Singlet pathway to the ground state of ultracold polar molecules |
| title_full_unstemmed | Singlet pathway to the ground state of ultracold polar molecules |
| title_short | Singlet pathway to the ground state of ultracold polar molecules |
| title_sort | singlet pathway to the ground state of ultracold polar molecules |
| topic | Science::Chemistry Ultracold Molecules Molecular Spectroscopy |
| url | https://hdl.handle.net/10356/144290 |
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