Project

Entangled two-photon absorption (ETPA) is a rapidly emerging technique for studying atoms and molecules, especially in low photon flux regimes. It has similarities to both classical single- and two-photon absorption techniques, which are cornerstones of modern optical imaging, but the quantum correlations, or photon-pair entanglement, also brings novel characteristics to investigate other physical regimes, e.g., in studying intermediate and virtual level transitions and dynamics.

We are exploring ETPA with the aim of better understanding this novel process and to develop non-linear spectroscopic techniques, which could provide an important tool for both fundamental and applied research, providing the opportunity to study atomic and molecular transition levels that would be unattainable with linear spectroscopy.