Identification of Deeply Bound Heteronuclear Molecules Using Pulsed Laser Depletion Spectroscopy

Abstract

We demonstrate that a near-dissociation photoassociation resonance can be used to create a deeply bound molecular sample of ultracold NaCs. To probe the resulting vibrational distribution of the sample, we use a new technique that can be applied to any ultracold molecular system. We utilize a tunable pulsed dye laser to produce efficient spectroscopic scans ($\sim 700$ cm${}^{-1}$ at a time) in which we observe the $1^1{\Sigma }^{+}\to 2^1{\Sigma }^{+}-2^3\Pi$ vibrational progression, as well as the dissociation limit to the Cs 6${}^2$P${}_{3/2}$ asymptote. We assign $1^1{\Sigma }^{+}$$(\text{v}$ = 4, 5, 6, 11, 19) vibrational levels in our sample.

4 pages, 5 figures

References in corpus (14)

• A High Phase-Space-Density Gas of Polar Molecules
• Formation of ultracold polar molecules in the rovibrational ground state
• Optical Production of Ultracold Polar Molecules
• Calculation of accurate permanent dipole moments of the lowest ${}^{1,3}{\Sigma }^{+}$ states of heteronuclear alkali dimers using extended basis sets
• Quantum gas of rovibronic ground-state molecules in an optical lattice
• Schemes for robust quantum computation with polar molecules
• Optical pumping and vibrational cooling of molecules
• An AC electric trap for ground-state molecules
• Inelastic collisions of ultra-cold heteronuclear molecules in an optical trap
• Ultracold polar molecules near quantum degeneracy
• Quantum Computation with Diatomic Bits in Optical Lattices
• Trapping of ultracold polar molecules with a Thin Wire Electrostatic Trap
• Efficient formation of deeply bound ultracold molecules probed by broadband detection
• Manufacturing a thin wire electrostatic trap (TWIST) for ultracold polar molecules

Cited by in corpus (5)

• Universalities in ultracold reactions of alkali polar molecules
• Long-range interactions between polar alkali-metal diatoms in external electric fields
• Formation of ultracold RbCs molecules by photoassociation
• Formation of deeply bound ultracold LiRb molecules via photoassociation near the Li 2S${}_{1/2}$ + Rb 5P${}_{3/2}$ asymptote
• Fourier-transform spectroscopy and relativistic electronic structure calculation on the $c^3{\Sigma }^{+}$ state of KCs