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arXiv · 1611.05089

Entangled two photon absorption cross section on the 808 nm region for the common dyes Zinc tetraphenylporphyrin and Rhodamine B

Juan. P. Villabona-Monsalve·Omar Calderón-Losada·Mayerlin Nuñez Portela·Alejandra Valencia
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Abstract

We report the measurement of the entangled two photon absorption cross section, $σ_E$, at 808 nm on organic chromophores in solution in a low photon flux regime. We performed measurements on Zinc tetraphenylporphyrin (ZnTPP) in Toluene and Rhodamine B (RhB) in Methanol. This is, to the best of our knowledge, the first time that $σ_E$ is measured for RhB. Additionally, we report a systematic study of the dependence of $σ_E$ on the molecular concentration for both molecular systems. In contrast to previous experiments, our measurements are based on detecting the pairs of photons that are transmitted by the molecular system. By using a coincidence count circuit it was possible to improve the signal to noise ratio. This type of work is important for the development of spectroscopic and microscopic techniques using entangled photons.

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Juan. P. Villabona-Monsalve, Omar Calderón-Losada, Mayerlin Nuñez Portela, Alejandra Valencia. 2016-11-15. Entangled two photon absorption cross section on the 808 nm region for the common dyes Zinc tetraphenylporphyrin and Rhodamine B. https://doi.org/10.1021/acs.jpca.7b06450

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