Article Dans Une Revue Scientific Reports Année : 2012

A monolithically integrated polarization entangled photon pair source on a silicon chip

Nobuyuki Matsuda
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Hanna Le Jeannic
Hiroshi Fukuda
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Tai Tsuchizawa
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Kaoru Shimizu
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Koji Yamada
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Hiroki Takesue
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Résumé

Integrated photonic circuits are one of the most promising platforms for large-scale photonic quantum information systems due to their small physical size and stable interferometers with near-perfect lateral-mode overlaps. Since many quantum information protocols are based on qubits defined by the polarization of photons, we must develop integrated building blocks to generate, manipulate and measure the polarization-encoded quantum state on a chip. The generation unit is particularly important. Here we show the first integrated polarization-entangled photon pair source on a chip. We have implemented the source as a simple and stable silicon-on-insulator photonic circuit that generates an entangled state with 91 ± 2% fidelity. The source is equipped with versatile interfaces for silica-on-silicon or other types of waveguide platforms that accommodate the polarization manipulation and projection devices as well as pump light sources. Therefore, we are ready for the full-scale implementation of photonic quantum information systems on a chip.

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hal-03271350 , version 1 (25-06-2021)

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Nobuyuki Matsuda, Hanna Le Jeannic, Hiroshi Fukuda, Tai Tsuchizawa, William John Munro, et al.. A monolithically integrated polarization entangled photon pair source on a silicon chip. Scientific Reports, 2012, 2, pp.817. ⟨10.1038/srep00817⟩. ⟨hal-03271350⟩
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