Velocity-selective EIT measurement of potassium Rydberg states

Abstract

We demonstrate a velocity selection scheme that mitigates suppression of electromagnetically induced transparency (EIT) by Doppler shifts for low--high EIT probe--coupling wavelength ordering. An optical pumping beam counter-propagating with the EIT probe beam transfers atoms between hyperfine states in a velocity selective fashion. Measurement of the transmitted probe beam synchronous with chopping of the optical pumping beam enables a Doppler-free EIT signal to be detected. Transition frequencies between 5P${}_{1/2}$ and $n$S${}_{1/2}$ states for $n=$26, 27, and 28 in ${}^{39}$K are obtained via EIT spectroscopy in a heated vapor cell with a probe beam stabilized to the 4S${}_{1/2}\to$5P${}_{1/2}$ transition. Using previous high-resolution measurements of the 4S${}_{1/2}\to$nS${}_{1/2}$ transitions, we make a determination of the absolute frequency of the 4S${}_{1/2}\to$5P${}_{1/2}$ transition. Our measurement is shifted by 560 MHz from the currently accepted value with a two-fold improvement in uncertainty. These measurements will enable novel experiments with Rydberg-dressed ultracold Fermi gases composed of ${}^{40}$K atoms.

References in corpus (10)

• Bose-Einstein Condensation of Erbium
• Observation of mesoscopic crystalline structures in a two-dimensional Rydberg gas
• Observation of dipole-dipole interaction in a degenerate quantum gas
• Quantum degenerate dipolar Fermi gas
• Dynamical crystallization in a low-dimensional Rydberg gas
• Stable Topological Superfluid Phase of Ultracold Polar Fermionic Molecules
• Creation of a low-entropy quantum gas of polar molecules in an optical lattice
• Microscopy of a scalable superatom
• Laser frequency stabilization to highly excited state transitions using electromagnetically induced transparency in a cascade system
• Exotic topological density waves in cold atomic Rydberg fermions

Cited by in corpus (6)

• Coherent control of group index and magneto-optical anisotropy in a multilevel atomic vapor
• Switchable dynamic Rydberg-dressed excitation via a cascaded double electromagnetically induced transparency
• Inverted Ladder Type Optical Excitation of Potassium Rydberg States with Hot and Cold Ensembles
• EIT spectroscopy of high-lying Rydberg states in ${}^{39}K$
• Velocity-selective spectroscopy measurements of Rydberg fine structure states in a hot vapor cell
• Autler-Townes spectroscopy of a Rydberg ladder