Parasitic Photon-Pair Suppression via Photonic Stop-Band Engineering

Abstract

We calculate that an appropriate modification of the field associated with only one of the photons of a photon pair can suppress generation of the pair entirely. From this general result, we develop a method for suppressing the generation of undesired photon pairs utilizing photonic stop bands. For a third-order nonlinear optical source of frequency-degenerate photons we calculate the modified frequency spectrum (joint spectral intensity) and show a significant increase in a standard metric, the coincidence to accidental ratio. These results open a new avenue for photon-pair frequency correlation engineering.

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• Multi-photon interference in the spectral domain by direct heralding of superposition states
• Roadmap on Integrated Quantum Photonics
• Diagnosing phase correlations in the joint spectrum of parametric downconversion using multi-photon emission