Mid infrared polarization engineering via sub-wavelength biaxial hyperbolic van der Waals crystals

Saurabh Dixit, Nihar Ranjan Sahoo, Abhishek Mall +1

Recently, in-plane biaxial hyperbolicity has been observed in $\alpha$-MoO${}_3$ --a van der Waal crystal-- in the mid-infrared frequency regime. Here, we present a comprehensive theore…