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Frontiers in Optics

Spectral mapping of an integrated type-II photon-pair source using quantum-classical correspondence

Hung-Pin Chung, Pawan Kumar, Kai Wang, Olivier Bernard, Chinmay Shirpurkar, Wen-Chiuan Su, Thomas Pertsch, Andrey A. Sukhorukov, Yen-Hung Chen, Frank Setzpfandt

Published Jan 1, 2019• 0 citations
Publisher

Abstract

We experimentally characterize the spectral properties of photon pairs generated by type-II spontaneous parametric down-conversion waveguide. The spectral properties of cross-polarized photon-pair are determined by quantum-classical correspondence.
DOI
10.1364/fio.2019.jtu3a.46

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Spectral properties of entangled photons generated via type-I frequency-nondegenerate spontaneous parametric down-conversion are studied theoretically and experimentally. For monochromatic pumping, the joint spectral intensity function for the photon pair is found to be symmetric even though each photon has a different central wavelength. The single-photon (first-order) interference shows the familiar triangular interferogram, usually associated with the cw-pumped frequency-degenerate type-II spontaneous parametric down-conversion. For broadband (ultrafast) pumping, on the other hand, the joint spectral intensity function is shown to be asymmetric, similar to the case of ultrafast-pumped frequency-degenerate type-II spontaneous parametric down-conversion. The spectral studies reported here are expected to play an important role in developing ultrabright two-color entangled photon sources.