Fig. 2: 400 nm thick lamella.

A An optical image of the lamella on sapphire. The resistivity measurement is schematically shown. Resistivity of Sr2RuO4 with in-plane confinement (B). Transmission in the range of visible light is shown in (C). Two different polarization directions were measured. One with linearly polarized light along the planes and one with the light linearly polarized perpendicular to the planes. While in-plane light is mostly absorbed, light polarized out-of-plane is transmitted with more than 80% efficiency.