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Identifying Atomically Thin Crystals with Diffusively Reflected Light by Domaretskiy, D.; Ubrig, N.; Gutiérrez-Lezama, I.; Tran, M. K.; Morpurgo, A. F. is a scholarly article available to read on EtoBox.

What is Identifying Atomically Thin Crystals with Diffusively Reflected Light about?

The field of two-dimensional materials has been developing at an impressive pace, with atomically thin crystals of an increasing number of different compounds that have become available, together with techniques enabling their assembly into functional heterostructures. The strategy to detect these atomically thin crystals has however remained unchanged since the discovery of graphene. Such an absence of evolution is starting to pose problems because for many of the 2D materials of current interest the optical contrast provided by the commonly used detection procedure is insufficient to identify the presence of individual monolayers or to determine unambiguously the thickness of atomically thin multilayers. Here we explore an alternative detection strategy, in which the enhancement of optical contrast originates from the use of optically inhomogeneous substrates, leading to diffusively reflected light. Owing to its peculiar polarization properties and to its angular distribution, diffusively reflected light allows a strong contrast enhancement to be achieved through the implementation of suitable illumination-detection schemes. We validate this conclusion by carrying out a detailed

Author

Domaretskiy, D.; Ubrig, N.; Gutiérrez-Lezama, I.; Tran, M. K.; Morpurgo, A. F.

Published

2021

Language

EN