Nonlinear nanoresonators for Bell state generation

Author:

Weissflog Maximilian A.12ORCID,Dezert Romain3ORCID,Vinel Vincent3ORCID,Gigli Carlo3ORCID,Leo Giuseppe3ORCID,Pertsch Thomas14ORCID,Setzpfandt Frank14ORCID,Borne Adrien3ORCID,Saravi Sina1ORCID

Affiliation:

1. Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena 1 , Albert-Einstein-Straße 15, 07745 Jena, Germany

2. Max Planck School of Photonics 2 , Hans-Knöll-Straße 1, 07745 Jena, Germany

3. Laboratoire Matériaux et Phénomènes Quantiques, Université Paris-Cité, CNRS 3 , 10 Rue Alice Domon et Léonie Duquet, F-75013 Paris, France

4. Fraunhofer Institute for Applied Optics and Precision Engineering 4 , Albert-Einstein-Straße 7, 07745 Jena, Germany

Abstract

Entangled photon states are a fundamental resource for optical quantum technologies and investigating the fundamental predictions of quantum mechanics. Up to now such states are mainly generated in macroscopic nonlinear optical systems with elaborately tailored optical properties. In this theoretical work, we extend the understanding on the generation of entangled photonic states toward the nanoscale regime by investigating the fundamental properties of photon-pair generation in sub-wavelength nonlinear nanoresonators. Taking materials with Zinc-Blende structure as an example, we reveal that such systems can naturally generate various polarization-entangled Bell states over a very broad range of wavelengths and emission directions, with little to no engineering needed. Interestingly, we uncover different regimes of operation, where polarization-entangled photons can be generated with dependence on or complete independence from the pumping wavelength and polarization, and the modal content of the nanoresonator. Our work also shows the potential of nonlinear nanoresonators as miniaturized sources of biphoton states with highly complex and tunable properties.

Funder

Deutsche Forschungsgemeinschaft

Agence Nationale de la Recherche

H2020 European Research Council

Bundesministerium für Bildung und Forschung

Thuringian Ministry for Economy, Science, and Digital Society and the European Social Funds

Friedrich-Schiller-Universität Jena

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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