Ultra-long-range Cs Trilobite Molecules in a Crossed 1064 nm Dipole Trap

Ultra-long-range molecules involving Rydberg atoms have been shown to exist in several different experimental regimes. Rydberg atom-Rydberg atom molecules have been created in the presence of bond-stabilizing electric fields at relatively low densities, $\la 10^{10}$ cm$^{-3}$. In a crossed dipole trap, where the density is $\sim 3$ orders of magnitude higher, new types of Rydberg atom molecules may be created. In particular, a novel bonding mechanism arises from the low energy scattering of a Rydberg atom electron off of a ground state atom. These so-called ``trilobite'' molecules can be in low or high angular momentum states. We present experimental spectra of low and high angular momentum trilobite molecules in a Cs crossed dipole trap.