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Figure 1

From: Generation of path-polarization hyperentanglement using quasi-phase-matching in quasi-periodic nonlinear photonic crystal

Figure 1

(a) Schematic for the generation of path-polarization hyperentangled photon pairs. NPC is designed to qusi-phase-matching 4 SPDC processes. The pump photon with frequency of ω p is injected into the designed NPC and gets through either of the 4 SPDC processes. Consequently, in our engineering, the path-polarization hyperentangled signal and idler photon with frequency of ω p /2 should be emitted from the NPC. (b) QPM condition for the 4 SPDC processes in generation of path-polarization hyperentangled photon pairs.

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