Integrated source of path-entangled photon pairs with efficient pump self-rejection
Abstract
We present a theoretical proposal for an integrated four-wave mixing source of narrow-band path-entangled photon pairs with efficient spatial pump self-rejection. The scheme is based on correlated loss in a system of waveguides in Kerr nonlinear media. We calculate that this setup gives the possibility for upwards of 100 dB pump rejection, without additional filtering. The effect is reached by driving the symmetric collective mode that is strongly attenuated by an engineered dissipation, while photon pairs are born in the antisymmetric mode. A similar set-up can additionally be realized for the generation of two-photon NOON states, also with pump self-rejection. We discuss the implementation of the scheme by means of the coherent diffusive photonics, and demostrate its feasibility in both glass (such as fused silica-glass and IG2) and planar semiconductor waveguide structures in indium phosphide (InP) and in silicon.
Citation
de la Hoz , P , Sakovich , A , Mikhalychev , A , Thornton , M , Korolkova , N & Mogilevtsev , D 2020 , ' Integrated source of path-entangled photon pairs with efficient pump self-rejection ' , Nanomaterials , vol. 10 , no. 10 , 1952 . https://doi.org/10.3390/nano10101952
Publication
Nanomaterials
Status
Peer reviewed
ISSN
2079-4991Type
Journal article
Rights
Copyright © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Description
This research was supported by the EU Flagship on Quantum Technologies, project PhoG (820365). D.M., A.S. and A.M. also acknowledge support from the National Academy of Sciences of Belarus program “Convergence”. The authors gratefully acknowledge the support from the Scottish Universities Physics Alliance (SUPA) and the Engineering and Physical Sciences Research Council (EPSRC).Collections
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