Fig. 6: Comparison between PDC in the ferroelectric and the paraelectric phases of SBN. | Nature Communications

Fig. 6: Comparison between PDC in the ferroelectric and the paraelectric phases of SBN.

From: Observation of strong nonlinear interactions in parametric down-conversion of X-rays into ultraviolet radiation

Fig. 6

The angular dependencies of the PDC signal corresponds to idler energy at 20 eV, for the tetragonal phase at 300 K (blue dots), and cubic phase at 385 K (red dots), for the (2 1 3) atomic planes. The two peaks in each curve correspond to the two solutions of the phase-matching equation. The Curie temperature of the crystal is between 340 and 350 K30. The horizontal axis is the signal angle with respect to the Bragg angle. The inset shows the signal angular dependence at the cubic phase. The vertical error bars indicate the counting statistics.

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