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Optimising graphene visibility in van der Waals heterostructures

Menon, Thanmay S and Mishra, Simli and Antony, Vidhu Catherine and Dixit, Kiranmayi and Kakkar, Saloni and Ahmed, Tanweer and Slam, Saurav and Jayaraman, Aditya and Hsieh, Kimberly and Karnatak, Paritosh and Ghosh, Arindam (2019) Optimising graphene visibility in van der Waals heterostructures. In: NANOTECHNOLOGY, 30 (39).

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Official URL: https://dx.doi.org/10.1088/1361-6528/ab2d88

Abstract

Graphene constitutes one of the key elements in many functional van der Waals heterostructures. However, it has negligible optical visibility due to its monolayer nature. Here we study the visibility of graphene in various van der Waals heterostructures and include the effects of the source spectrum, oblique incidence and the spectral sensitivity of the detector to obtain a realistic model. A visibility experiment is performed at different wavelengths, resulting in a very good agreement with our calculations. This allows us to reliably predict the conditions for better visibility of graphene in van der Waals heterostructures. The framework and the codes provided in this work can be extended to study the visibility of any 2D material within an arbitrary van der Waals heterostructure.

Item Type: Journal Article
Additional Information: copyright for this article belongs to IOP PUBLISHING LTD
Keywords: visibility; graphene; van der Waal heterostructures
Department/Centre: UG Programme
Division of Interdisciplinary Research > Centre for Nano Science and Engineering
Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 08 Aug 2019 05:32
Last Modified: 08 Aug 2019 05:32
URI: http://eprints.iisc.ac.in/id/eprint/63352

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