Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Setting Experimental Bounds on Entangled Two-Photon Absorption Cross Sections

Kristen M. Parzuchowski, Alexander Mikhaylov, Michael D. Mazurek, Ryan N. Wilson, Daniel J. Lum, Thomas Gerrits, Charles H. Camp, Martin J. Stevens, Ralph Jimenez

Published Jan 1, 2022• 1 citation
Publisher

Abstract

We show strong evidence—from both fluorescence and transmittance measurements—that entangled two-photon absorption cross sections are several orders of magnitude lower than many prior reports have claimed.
DOI
10.1364/cleo_at.2022.jtu4d.1

Related papers

Setting limits on two-photon absorption cross sections in common fluorescent molecules with entangled photon pairs excitation

Alexander Mikhaylov, Kristen M. Parzuchowski, Michael D. Mazurek +6 more

We present a detailed study of two-photon absorption in some common fluorescent molecules with excitation by entangled photon pairs. Using fluorescence and transmittance measurements, we set an upper bound on the absorption cross sections.

Conference on Lasers and Electro-Optics•Jan 1, 2020•1 citation

Hot-Band Absorption Can Mimic Entangled Two-Photon Absorption

Ryan N. Wilson, Alexander Mikhaylov, Kristen M. Parzuchowski +4 more

While searching for entangled two-photon absorption in LDS798, we instead observe fluorescence signals originating from hot-band absorption. This process could lead to overestimating entangled two-photon absorption cross sections by several orders of magnitude.

Conference on Lasers and Electro-Optics•Jan 1, 2022•1 citation

Setting Bounds on Entangled Two-Photon Absorption Cross Sections in Common Fluorophores

Kristen M. Parzuchowski, Alexander Mikhaylov, Michael D. Mazurek +6 more

Excitation with entangled photon pairs may lead to an increase in the efficiency of two-photon absorption at low photon flux. The corresponding process, entangled two-photon absorption (E2PA), has been investigated in numerous theoretical and experimental studies. However, significant ambiguity and inconsistency remain in the literature about the absolute values of E2PA cross sections. Here, we use a fluorescence-based registration scheme to experimentally determine upper bounds on the cross sections for six fluorophores. These bounds are up to 4 orders of magnitude lower than the smallest published cross section. For two samples that have been studied by others, Rhodamine 6G and 9R-S, we measure upper bounds 4 and 5 orders of magnitude lower than the previously reported cross sections.

arXiv:2008.02664•Physical Review Applied•Apr 6, 2021•117 citations

Bounding Entangled Two-Photon Absorption with Sensitive Transmittance Measurements

Michael D. Mazurek, Kristen M. Parzuchowski, Alexander Mikhaylov +5 more

Two-photon absorption rates may be enhanced with energy-time entangled states of light. Using a sensitive transmittance measurement we find no evidence of this enhancement, in disagreement with previously reported results.

Conference on Lasers and Electro-Optics•Jan 1, 2021•1 citation

Limitations in fluorescence-detected entangled two-photon-absorption experiments: Exploring the low- to high-gain squeezing regimes

Tiemo S. Landes, Brian J. Smith, Michael G. Raymer

The authors present an experimental study of entangled two-photon absorption in solvated rhodamine 6G, providing strong evidence that the orders-of-magnitude increases in two-photon-absorption efficiency by using entangled light reported in previous studies cannot be explained by the community's current understanding of the process. Thus, the sought-after advantages of using two-photon absorption of time-frequency-entangled photon pairs as a practical tool for enhancing molecular spectroscopy and biological imaging remains elusive.

Physical Review A•Sep 9, 2024•28 citations

Towards Entangled Two-Photon Absorption in Cesium Atoms

Michael Stiven Caracas Núñez, Miguel Ángel Gonz’alez Jaimes, Dario Egloff +1 more

We address challenges in entangled two-photon absorption (ETPA) experiments, focusing on distinguishing ETPA signals in atomic systems, in particular, cesium. Our study presents theoretical and experimental methods to calculate and measure TPA and ETPA cross-sections.

Latin America Optics and Photonics Conference•Jan 1, 2024•0 citations
Excitation with entangled photon pairs may lead to an increase in the efficiency of two-photon absorption at low photon flux. The corresponding process, entangled two-photon absorption (E2PA), has been investigated in numerous theoretical and experimental studies. However, significant ambiguity and inconsistency remain in the literature about the absolute values of E2PA cross sections. Here, we use a fluorescence-based registration scheme to experimentally determine upper bounds on the cross sections for six fluorophores. These bounds are up to 4 orders of magnitude lower than the smallest published cross section. For two samples that have been studied by others, Rhodamine 6G and 9R-S, we measure upper bounds 4 and 5 orders of magnitude lower than the previously reported cross sections.
The authors present an experimental study of entangled two-photon absorption in solvated rhodamine 6G, providing strong evidence that the orders-of-magnitude increases in two-photon-absorption efficiency by using entangled light reported in previous studies cannot be explained by the community's current understanding of the process. Thus, the sought-after advantages of using two-photon absorption of time-frequency-entangled photon pairs as a practical tool for enhancing molecular spectroscopy and biological imaging remains elusive.