Antony, Vidhu Catherine — Analysis of the Optical Visibility of Graphite on different substrates and Van-der-Waals Hetero-structures
The marked visibility of graphene is due to the phase shift in the interference colour. The study is based on the analysis of graphene visibility on various substrates and hetero-structures such as transition metal dichalcogenides (TMDCs) like Molybdenum Disulphide (MoS2) and hexagonal Boron Nitrite (h-BN). The visibility of graphene depends on the type of substrate, the thickness of the graphite layer, the thickness of various layers of the substrate and the incident wavelength. A comparison of the theoretically obtained contrast colour plots for each of the particular instances with the experimental images was made. The contrast of the graphite layer on the substrate was then calculated to figure out at which wavelength range it is best visible.
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