Singlet fission and triplet fusion have been investigated extensively over the last few decades with clear consensus that these processes are mediated by a correlated pair of triplets (TT). It has been proposed that TT is a spin-entangled quantum state beyond a simple coherent superposition of free triplet states. While such a hypothesis has been verified via indirect signatures in time resolved experiments, here we explore for a direct probe of the exciton entanglement by quantum-optical spectroscopy. Our experimental methodology is based on quantum process of tomography of polarization entangled photon pairs (EPPs). We measure the density matrix of the EPPs that are resonant with the excited state absorption of TT and transmitted through a photo-excited tetracene derivative to investigate the nature of inherent quantum correlations.<br/>

Quantum process tomography of entangled photons as a probe of intermediates of singlet fission in a tetracene derivative

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.