ArticleChemphyschem : a European journal of chemical physics and physical chemistry2026
Measurement of the Entangled Two-Photon Absorption Cross-Sections of 4-Aminoazobenzene.
Article in Chemphyschem : a European journal of chemical physics and physical chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Recently, entangled two-photon absorption (ETPA) has attracted considerable attention, yet reported cross-sections vary widely. In this study, we focused on 4-aminoazobenzene, an azobenzene derivative that exhibits extremely low one-photon absorption in the wavelength range of time-entangled photon pairs. By measuring the time correlation between the two photons transmitted through the sample solution and separating correlated from uncorrelated counts, we distinguished between ETPA and linear-loss contributions. The ETPA cross-section is only ≈10
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