Entangled Photons in Energy Superpositions and their Interactions with Molecular Chromophores and TMD Nanoribbons

Low dimensional materials are often investigated as sources of correlated photons for a diverse set of applications, which could lead to expanded functionalities for such materials. This motivates this work in which, by means of density functional theory simulations, we theoretically and computationally investigate the influence of photon energy superpositions in their interaction with molecular chromophores and transition-metal dichalcogenide (TMD) nanoribbons. We observe the possibility of substantially modifying the two-photon absorption cross sections of molecular chromophores by controlling the photon correlation. This is evidenced by quantum constructive and destructive interferences that are predicted by our theoretical model. These effects depend on the Bloch sphere description of the photon-pair states. In addition, our simulations of the band structure of multilayer TMD nanoribbons suggest these phenomena may also be observed in such systems with appropriate functionalization, where the possible electronic transitions are identified and discussed.