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arXiv · 2202.05985

Entangled two-photon absorption detection through a Hong-Ou-Mandel interferometer

Freiman Triana-Arango·Gabriel Ramos-Ortiz·Roberto Ramírez-Alarcón
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Abstract

Recently, different experimental methods to investigate the entangled two-photon absorption (ETPA) process in a variety of materials have been reported. The present work reports on a different approach on which the ETPA process is detected based on the changes induced on the Hong-Ou-Mandel (HOM) interferogram of two photons produced by a spontaneous parametric down conversion (SPDC) Type-II process. Using an organic solution of the laser dye Rhodamine B as a model, it is demonstrated that ETPA at 800nm can be monitored by the changes in the temporal-width and visibility of the HOM interferogram produced by the photons at a beam splitter after interacting with the sample. Additionally, we present a detail model in which the sample is modeled as a filtering function which fullfills the energy conservation conditions required by ETPA, allowing to explain the experimental observations with excellent agreement. We believe that this work represents a new perspective to study the ETPA process, by using an ultra-sensitive quantum interference technique and a detailed mathematical model of the process.

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Freiman Triana-Arango, Gabriel Ramos-Ortiz, Roberto Ramírez-Alarcón. 2022-02-12. Entangled two-photon absorption detection through a Hong-Ou-Mandel interferometer. https://arxiv.org/abs/2202.05985

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