Integrated Source of Path-Entangled Photon Pairs with Efficient Pump Self-Rejection

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 possibil...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-09, Vol.10 (10), p.1952
Main Authors: de la Hoz, Pablo, Sakovich, Anton, Mikhalychev, Alexander, Thornton, Matthew, Korolkova, Natalia, Mogilevtsev, Dmitri
Format: Article
Language:English
Subjects:
coherent diffusive photonics
entangled photons generation
Four-wave mixing
Fused silica
Phosphides
Photons
Propagation
Rejection
Silica
Silica glass
Silicon dioxide
Symmetry
Waveguides
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Summary: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.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10101952