Controllable transitions among phase-matching conditions in a single nonlinear crystal
Ziqi Zeng,
Shixin You,
Zixiang Yang
et al.
Abstract:Entangled photon pairs are crucial resources for quantum information processing protocols. Via the process of spontaneous parametric downconversion (SPDC), we can generate these photon pairs using bulk nonlinear crystals. Traditionally, the crystal is designed to satisfy a specific type of phase-matching condition. Here, we report controllable transitions among different types of phase matching in a single periodically poled potassium titanyl phosphate crystal. By carefully selecting pump conditions, we can sa… Show more
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