Fig. 3: Polarization dependence of circular intensity difference in second harmonic generation (SHG) around a ferroaxial domain boundary. | npj Quantum Materials

Fig. 3: Polarization dependence of circular intensity difference in second harmonic generation (SHG) around a ferroaxial domain boundary.

From: Three-dimensional imaging of ferroaxial domains using circularly polarized second harmonic generation microscopy

Fig. 3

a, b Two-dimensional maps of SH intensity obtained with (a) RCP, (b) LCP, and (c) linearly polarized fundamental light. Right panels of (a–c) show the profiles of SH intensity along the white dashed lines of the respective images. In (a), the crystallographic axes are indicated as white arrows. The white arrow embedded in (c) corresponds to the polarization directions of fundamental light and SHG. The upper and the lower areas with different SH intensities by measurements using circularly polarized light correspond to either A+ or A− ferroaxial domains. Regardless of the light polarization, the SH intensity is enhanced at the domain boundary. d Three-dimensional image of SH intensity at the same area as (a–c). e Depth profile in a plane cut at the white dashed line in (d). The bright line represents the depth profile of the domain boundary.

Back to article page