Exploiting entangled two-photon absorption

This project brings together a diverse group of theorists and experimentalists from academy and industry to explore and better understand the potential of two-photon absorption when using entanglement. We are exploring Entangled Two-Photon Absorption (ETPA) with the aim of better understanding this novel process with a view to developing 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.


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. This project is exploring the potential of ETPA


The project consists of academic and industrial partners from Switzerland, Germany, Poland and the UK. There is a strong interdisciplinarity of the project partners, not only spanning theory and experiment but also expertise in quantum optics, physical chemistry, molecular systems and plasmonics. This  promises a high degree of cross-fertilisation and synergy, which we hope will provide new insights and understanding of ETPA and its application potential.


All publications and dissemination articles of interest will be catalogued here. Where possible this will be freely available or linked to open access archives.