Optical cycling in polyatomic molecules with complex hyperfine structure

Abstract

We have developed and demonstrated a scheme to achieve rotationally-closed photon cycling in polyatomic molecules with complex hyperfine structure and sensitivity to hadronic symmetry violation, specifically ${}^{171}$YbOH and ${}^{173}$YbOH. We calculate rotational branching ratios for spontaneous decay and identify repumping schemes which use electro-optical modulators (EOMs) to address the hyperfine structure. We demonstrate our scheme by cycling photons in a molecular beam and verify that we have achieved rotationally-closed cycling by measuring optical pumping into unaddressed vibrational states. Our work makes progress along the path toward utilizing photon cycling for state preparation, readout, and laser cooling in precision measurements of polyatomic molecules with complex hyperfine structure.

arXiv comment10 pages, 7 figures

References in corpus (23)

• Search for New Physics with Atoms and Molecules
• Cold and Ultracold Molecules: Science, Technology, and Applications
• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules
• Precision Measurement of Time-Reversal Symmetry Violation with Laser-Cooled Polyatomic Molecules
• Magneto-Optical Trap for Polar Molecules
• Magneto-Optical Trapping and Sub-Doppler Cooling of a Polyatomic Molecule
• Laser-Cooled Polyatomic Molecules for Improved Electron Electric Dipole Moment Searches
• Time-reversal symmetry violation in molecules induced by nuclear magnetic quadrupole moments
• Polyatomic Molecules as Quantum Sensors for Fundamental Physics
• Demonstration of a Sensitive Method to Measure Nuclear Spin-Dependent Parity Violation
• Laser cooled molecules
• Enhanced Yield from a Cryogenic Buffer Gas Beam Source via Excited State Chemistry
• Isotope Shifts of Radium Monofluoride Molecules
• Accurate prediction and measurement of vibronic branching ratios for laser cooling linear polyatomic molecules
• Enhanced $\mathcal{P},\mathcal{T}$-violating nuclear magnetic quadrupole moment effects in laser-coolable molecules
• Theoretical study of ${}^{173}$YbOH to search for the nuclear magnetic quadrupole moment
• The pure rotational spectrum of YbOH
• A laser cooling scheme for precision measurements using barium monofluoride (137Ba19F) molecules
• Fine and hyperfine interactions in ${}^{171}$YbOH and ${}^{173}$YbOH
• Characterizing the Fundamental Bending Vibration of a Linear Polyatomic Molecule for Symmetry Violation Searches
• Statistical sensitivity of phase measurements via laser-induced fluorescence with optical cycling detection
• Synthesizing Optical Spectra using Computer-Generated Holography Techniques

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• Laser cooled 137BaF molecules for measuring nuclear-spin-dependent parity violation
• Molecular laser cooling using serrodynes: Implementation, characterization and prospects
• High-resolution spectroscopy of barium monofluoride: Odd isotopologues, hyperfine structure and isotope shifts
• Magnetic hyperfine structure constants of ${}^{137}$BaF in the ${}^2{\Pi }_{1/2}$ and ${}^2{\Pi }_{3/2}$ excited states
• Molecular Quantum Control Algorithm Design by Reinforcement Learning