Graphene/h BN heterostructures can be considered as one of the basic building blocks for
the next-generation optoelectronics mostly owing to the record-high electron mobilities.
However, currently, the studies of the intrinsic optical properties of graphene are limited to
the standard substrates (SiO2/Si, glass, quartz) despite the growing interest in graphene/h
BN heterostructures. This can be attributed to a challenging task of the determination of h
BN's strongly anisotropic dielectric tensor in the total optical response. In this study, we …

Two-dimensional materials look poised to revolutionize information and communication
technologies. Here, the authors leveraged spatially resolved ellipsometry to engineer the
optical absorption of graphene on hexagonal boron nitride substrates, thereby disclosing
effective solutions for flexible optoelectronics.Combination of hexagonal boron nitride (hBN)
with graphene into van der Waals heterostructures 1, 2 attracted much attention recently.
hBN is an insulator with a large bandgap that possesses honeycomb crystal structure …