Fig. 3: Birefringence of MoO3 flakes.
From: In-plane anisotropic optical and mechanical properties of two-dimensional MoO3
Optical contrast vs. wavelength spectra, measured for the 28 nm thick MoO3 flake shown in the bottom inset, as function of the angle formed between the incident linearly polarized light and the crystal a-axis. Top inset: Polar plot of the change in refractive index as a function of the relative orientation between the incident linearly polarized light and the a-axis of the crystal.
