Juan P. Villabona-Monsalve, Ryan K. Burdick, Theodore Goodson III Department of Chemistry, University of Michigan, Ann Arbor, MI 48109 Entangled photons exhibit strong nonclassical frequency and time correlations simultaneously, which allow them to perform non-linear spectroscopy in new ways compared to classical means. This report demonstrates the accessibility of entangled two-photon absorption (ETPA) as an analytical technique using CW-pumped Type-I degenerate spontaneous parametric down-conversion. We made improvements to lower the noise, error, and limit of detection of the ETPA experiment.1 We quantify frequency entanglement from the experimentally measured joint frequency spectrum by using the Schmidt decomposition. Our experiment can be used to analyze a wide variety of chromophores of chemical and biological significance. We explore the possibility of performing control of the population of specific excited states in molecules using a spatial light modulator in the setup.

Simplified technique for entangled two-photon absorption measurements with CW pumped type-I spontaneous parametric down-conversion

ACS Spring Meeting 2021

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