Enhanced entangled-photon-pair interaction with metallic nanoparticles

Ariel Ashkenazy, Andre Stefanov, Dror Fixler

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


In recent years, many quantum lights-based applications were suggested, ranging from encrypted communication and precision metrology to fluorescent biomolecules detection and advanced spectroscopy schemes. Such applications mostly rely on entanglement, the property of correlations between particles which cannot be explained by classical mechanisms, to overcome classical light limitations. Some of these applications, e.g. nonlinear spectroscopy, require the use of entangled-photon-pair interaction (EPPI) with the matter. However, such entangled pairs, generated through spontaneous parametric down-conversion (SPDC), are scarce, and multi-photon interaction with matter is usually very weak and barely detectable. Therefore, an enhancement of this interaction is needed. In our research, we investigate a novel way to achieve such enhanced EPPI using metallic nanoparticles (MNPs), which are known for their exceptional capability of light-matter coupling at their localized surface plasmon resonance (LSPR). We present a novel way of theoretically estimating the rate of EPPI with MNPs, based on a simple method of classical light second-harmonic generation (SHG) measurements. The theory is supported with experimental results, obtained for a solution of silver NPs (SNPs). These results show an estimated six orders-of-magnitude EPPI enhancement, relative to the best organic molecules, and indicate that the use of SNPs can be advantageous for realization of advanced quantum light applications.

Original languageEnglish
Title of host publicationNanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVI
EditorsDan V. Nicolau, Dror Fixler, Ewa M. Goldys
ISBN (Electronic)9781510624245
StatePublished - 2019
EventNanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVI 2019 - San Francisco, United States
Duration: 3 Feb 20194 Feb 2019

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferenceNanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVI 2019
Country/TerritoryUnited States
CitySan Francisco

Bibliographical note

Publisher Copyright:
© 2019 SPIE.


  • Entangled-photon-pair interaction
  • Entangled-photons
  • Localized surface plasmons
  • Nanoparticles
  • Secondharmonic generation


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