Electrically tuned Förster resonances in collisions of NH${}_3$ with Rydberg He atoms

Abstract

Effects of weak electric fields on resonant energy transfer between NH${}_3$ in the X ${}^1$A${}_1$ ground electronic state, and Rydberg He atoms in triplet states with principal quantum numbers $n=36$-$41$ have been studied in a crossed beam apparatus. For these values of $n$, electric-dipole transitions between the Rydberg states that evolve adiabatically to the $|ns⟩$ and $|np⟩$ states in zero electric field can be tuned into resonance with the ground-state inversion transitions in NH${}_3$ using electric fields, with energy transfer occurring via Förster resonance. In the experiments the Rydberg He atoms, traveling in pulsed supersonic beams, were prepared by resonant two-photon excitation from the metastable $1s2s{}^3{S}_1$ level and crossed an effusive beam of NH${}_3$ before being detected by state-selective pulsed-electric-field ionization. The resonant-energy-transfer process was identified by monitoring changes in the ionization signal from the $|ns⟩$ and $|np⟩$ Rydberg states for each value of $n$. The electric field dependence of the experimental data is in good agreement with the results of calculations in which the resonant dipole-dipole coupling between the collision partners was accounted for.

arXiv comment6 pages, 4 figures

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Cited by in corpus (12)

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• Experimental demonstration of a Rydberg-atom beam splitter
• Microwave spectroscopy of the $1\mathrm{s}n\mathrm{p}{}^3{\mathrm{P}}_J$ fine structure of high Rydberg states in ${}^4$He
• Effective spin-spin interactions in bilayers of Rydberg atoms and polar molecules
• Probing resonant energy transfer in collisions of ammonia with Rydberg helium atoms by microwave spectroscopy
• Rydberg state ionization dynamics and tunnel ionization rates in strong electric fields
• Rydberg atom-enabled spectroscopy of polar molecules via Förster resonance energy transfer
• Sympathetic cooling and slowing of molecules with Rydberg atoms
• Confinement of high- and low-field-seeking Rydberg atoms using time-varying inhomogeneous electric fields
• Time dependence of few-body Förster interactions among ultracold Rydberg atoms
• Probing van der Waals interactions and detecting polar molecules by Förster resonance energy transfer with Rydberg atoms at temperatures below 100 mK