Accurate prediction and measurement of vibronic branching ratios for laser cooling linear polyatomic molecules

Abstract

We report a generally applicable computational and experimental approach to determine vibronic branching ratios in linear polyatomic molecules to the $10^{-5}$ level, including for nominally symmetry forbidden transitions. These methods are demonstrated in CaOH and YbOH, showing approximately two orders of magnitude improved sensitivity compared with the previous state of the art. Knowledge of branching ratios at this level is needed for the successful deep laser cooling of a broad range of molecular species.

References in corpus (11)

• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Magneto-optical trapping of a diatomic molecule
• Precision Test of Mass Ratio Variations with Lattice-Confined Ultracold Molecules
• Precision Measurement of Time-Reversal Symmetry Violation with Laser-Cooled Polyatomic Molecules
• Radio Frequency Magneto-Optical Trapping of CaF with High Density
• Magneto-Optical Trap for Polar Molecules
• High accuracy theoretical investigations of CaF, SrF, and BaF and implications for laser-cooling
• Determination of CaOH and CaOCH${}_3$ vibrational branching ratios for direct laser cooling and trapping
• Franck-Condon tuning of optical cycling centers by organic functionalization
• Prospects for a Narrow Line MOT in YO
• Observation and laser spectroscopy of ytterbium monomethoxide, YbOCH${}_3$

Cited by in corpus (17)

• Magneto-Optical Trapping and Sub-Doppler Cooling of a Polyatomic Molecule
• Functionalizing Aromatic Compounds with Optical Cycling Centers
• Optical Trapping of a Polyatomic Molecule in an $\ell$-Type Parity Doublet State
• Characterizing the Fundamental Bending Vibration of a Linear Polyatomic Molecule for Symmetry Violation Searches
• Vibronic branching ratios for nearly-closed rapid photon cycling of SrOH
• ExoMol line lists -- XLVII. Rovibronic molecular line list of the calcium monohydroxide radical (CaOH)
• Blackbody thermalization and vibrational lifetimes of trapped polyatomic molecules
• Intensity-borrowing mechanisms pertinent to laser cooling of linear polyatomic molecules
• $\mathcal{T},\mathcal{P}$-odd effects in the LuOH${}^{+}$ cation
• Optical cycling in polyatomic molecules with complex hyperfine structure
• Radiative Decay Rate and Branching Fractions of MgF
• Multivalent optical cycling centers in polyatomic molecules
• Impact of the ligand deformation on the $\mathcal{P}$,$\mathcal{T}$-violation effects in the YbOH molecule
• Vibrational Branching Ratios for Laser-Cooling of Nonlinear Strontium-Containing Molecules
• Direct measurement of high-lying vibrational repumping transitions for molecular laser cooling
• Vibronic coupling limits the use of high-lying electronic states in complex molecules for laser cooling
• Nuclear Electric Quadrupole Moment-Induced Parity Doubling in Molecules for Symmetry-Violation Searches