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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/2510.22388 |
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| _version_ | 1866908612239032320 |
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| author | Wojcik, Pawel Zhou, Haowen Khvorost, Taras Zhu, Guo-Zhu Lao, Guanming Caram, Justin R. Alexandrova, Anastassia N. Hudson, Eric R. Campbell, Wesley C. Krylov, Anna I. |
| author_facet | Wojcik, Pawel Zhou, Haowen Khvorost, Taras Zhu, Guo-Zhu Lao, Guanming Caram, Justin R. Alexandrova, Anastassia N. Hudson, Eric R. Campbell, Wesley C. Krylov, Anna I. |
| contents | We report detailed characterization of the vibronic interactions between the first two electronically excited states, A and B, in SrOPh (Ph = phenyl, -C6H5) and its deuterated counterpart, SrOPh-d5 (-C6D5). The vibronic interactions, which arise due to non-adiabatic coupling between the two electronic states, mix the B,v0 state with the energetically close vibronic level A,v21v33, resulting in extra transition probability into the latter state. This state mixing is more prominent in the deuterated molecule because of the smaller energy gap between the interacting states. We model the mixing of the A and B states using the Koppel-Domcke-Cederbaum (KDC) Hamiltonian parametrized in the diabatic framework of Ichino, Gauss, and Stanton on the basis of equation-of-motion coupled-cluster calculations. The simulation attributes the observed mixing to a second-order effect mediated by linear quasi-diabatic couplings between the A-C and B-C states. Based on the measured spectra, we deduce an effective coupling strength of 0.5 cm-1. Non-adiabatic couplings between different electronic states is an important factor that should be considered in the design of laser-cooling protocols for complex molecules. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_22388 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Unraveling vibronic interactions in molecules functionalized with optical cycling centers Wojcik, Pawel Zhou, Haowen Khvorost, Taras Zhu, Guo-Zhu Lao, Guanming Caram, Justin R. Alexandrova, Anastassia N. Hudson, Eric R. Campbell, Wesley C. Krylov, Anna I. Chemical Physics We report detailed characterization of the vibronic interactions between the first two electronically excited states, A and B, in SrOPh (Ph = phenyl, -C6H5) and its deuterated counterpart, SrOPh-d5 (-C6D5). The vibronic interactions, which arise due to non-adiabatic coupling between the two electronic states, mix the B,v0 state with the energetically close vibronic level A,v21v33, resulting in extra transition probability into the latter state. This state mixing is more prominent in the deuterated molecule because of the smaller energy gap between the interacting states. We model the mixing of the A and B states using the Koppel-Domcke-Cederbaum (KDC) Hamiltonian parametrized in the diabatic framework of Ichino, Gauss, and Stanton on the basis of equation-of-motion coupled-cluster calculations. The simulation attributes the observed mixing to a second-order effect mediated by linear quasi-diabatic couplings between the A-C and B-C states. Based on the measured spectra, we deduce an effective coupling strength of 0.5 cm-1. Non-adiabatic couplings between different electronic states is an important factor that should be considered in the design of laser-cooling protocols for complex molecules. |
| title | Unraveling vibronic interactions in molecules functionalized with optical cycling centers |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2510.22388 |