Trapping Ultracold Fermionic Atoms in a Ring Bowtie Cavity

We have trapped ultracold fermionic atoms (⁶Li) in a ring cavity for the first time. The cavity is in a symmetric ring bowtie configuration with all glass-construction for compatibility with UHV environments and experiments requiring large magnetic fields for tuning atomic interactions. The high finesse and excellent passive mechanical stability of the cavity facilitate the creation of smooth, stable trapping potentials, with depths of up to 1 mK. The atoms can also be placed in a crossed-beam dipole trap, a 1D optical lattice, or a 2D optical lattice by varying the configuration of the cavity pump fields. After reporting on the performance of this first cavity, we will describe plans to use cavities of this type to study coupled atom-cavity systems in previously unexplored configurations