Probing optical anisotropy of nanometer-thin van der waals microcrystals by near-field imaging

Abstract

The optical response of van der Waals layered crystals is strongly anisotropic. Here, the authors develop a nano-imaging technique to determine the in-plane and out-of-plane components of the anisotropic dielectric tensors in MoS2 and hBN, two representative van der Waals crystals.