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Conference on Lasers and Electro-Optics

Phase tomography of spontaneously emitted photon-pairs

Imad I. Faruque, Ben M. Burridge, Massimo Borghi, Jorge Barreto, John Rarity

Published Jan 1, 2021• 0 citations
Publisher

Abstract

We have directly measured the joint spectral phase of spontaneously emitted photon-pairs for the first time. We have devised a novel tomographic method using quantum interference of bi-photon functions. This method can potentially be used for quantum sensing.
DOI
10.1364/cleo_qels.2021.ff2i.1

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Abstract We present a method of tomography in which photon pairs from a device-under-test (DUT) are experimentally characterised by quantum interference with a reference photon pair source; we call this quantum-referenced spontaneous emission tomography (Q-SpET). In Q-SpET, the joint spectral phase (JSP) of photon pairs generated by a DUT can be reconstructed by combining four spectrally resolved interferograms. We demonstrate this theoretically and experimentally, characterising the JSP of a microresonator photon pair source. Our method is fully implemented on a chip, demonstrating the compactness, inherent phase stability, low complexity, and resource efficiency of this method.
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