Double resonance of Raman transitions in a degenerate Fermi gas

Abstract

We measure momentum-resolved Raman spectra of a spin-polarized degenerate Fermi gas of ${}^{173}$Yb atoms for a wide range of magnetic fields, where the atoms are irradiated by a pair of counterpropagating Raman laser beams as in the conventional spin-orbit coupling scheme. Double resonance of first- and second-order Raman transitions occurs at a certain magnetic field and the spectrum exhibits a doublet splitting for high laser intensities. The measured spectral splitting is quantitatively accounted for by the Autler-Townes effect. We show that our measurement results are consistent with the spinful band structure of a Fermi gas in the spatially oscillating effective magnetic field generated by the Raman laser fields.

7 pages, 6 figures

References in corpus (7)

• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Degenerate Quantum Gases with Spin-Orbit Coupling
• Degenerate Fermi Gases of Ytterbium
• Bragg spectroscopy of a strongly interacting Fermi gas
• A long-lived spin-orbit-coupled degenerate dipolar Fermi gas
• Spin-orbit coupled two-electron Fermi gases of ytterbium atoms

Cited by in corpus (6)

• Topological Creutz Ladder in a Resonantly Shaken 1D Optical Lattice
• Band Gap Closing in a Synthetic Hall Tube of Neutral Fermions
• Realization of a cross-linked chiral ladder with neutral fermions in an optical lattice by orbital-momentum coupling
• Spin-exchange-induced exotic superfluids in a Bose-Fermi spinor mixture
• Adiabatic spin-dependent momentum transfer in an SU(N) degenerate Fermi gas
• Photoassociation spectroscopy of ultracold ${}^{173}$Yb atoms near the intercombination line