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Direct Generation of Frequency-bin Entangled Photons via Two-period Quasi-phase-matched Parametric Downconversion by Kaneda, Fumihiro; Suzuki, Hirofumi; Shimizu, Ryosuke; Edamatsu, Keiichi is a scholarly article available to read on EtoBox.

What is Direct Generation of Frequency-bin Entangled Photons via Two-period Quasi-phase-matched Parametric Downconversion about?

We report a simple scheme for direct generation of frequency-bin entangled photon pairs via spontaneous parametric downconversion. Our fabricated nonlinear optical crystal with two different poling periods can simultaneously satisfy two different, spectrally symmetric nondegenerate quasi-phase-matching conditions, enabling the direct generation of entanglement in two discrete frequency-bin modes. Our produced photon pairs exhibited Hong-Ou-Mandel interference with high-visibility beating oscillations, a signature of two-mode frequency-bin entanglement. Moreover, we demonstrate deterministic entanglement-mode conversion from frequency-bin to polarization modes, with which our source can be more versatile for various quantum applications. Our scheme can be extended to direct generation of high-dimensional frequency-bin entanglement, and thus will be a key technology for frequency-multiplexed optical quantum information processing.

Author

Kaneda, Fumihiro; Suzuki, Hirofumi; Shimizu, Ryosuke; Edamatsu, Keiichi

Published

2018

Language

EN