Probing Dipole-Dipole Interactions using Dual-Comb Spectroscopy

Dipole-dipole interactions are fundamental processes that mediate coupling between atoms and molecules. Evaluating these interactions is critical for understanding photosynthesis, energy transfer in materials, and the Rydberg blockade, which has applications in quantum computing. While traditional linear spectroscopy can measure the effects of dipole-dipole interactions, couplings between excited energy states are not easily accessible and require multidimensional techniques. However, multidimensional spectroscopy often requires large experimental apparatus, complex stabilization procedures, and long acquisition times.

Here, we demonstrate the use of dual-comb spectroscopy (DCS) to provide rapid, high resolution measurements of dipole-dipole interactions in rubidium vapor. The resulting measurements of coupled energy states demonstrate the efficacy of DCS in investigating dipole-dipole interactions in a wide range of materials.