Optimising graphene visibility in van der Waals heterostructures

被引：6

作者：

Menon, Thanmay S. ^{[1
]}

Mishra, Simli ^{[2
]}

Antony, Vidhu Catherine ^{[3
]}

Dixit, Kiranmayi ^{[4
,7
]}

Kakkar, Saloni ^{[5
]}

Ahmed, Tanweer ^{[5
]}

Slam, Saurav ^{[5
]}

Jayaraman, Aditya ^{[5
]}

Hsieh, Kimberly ^{[5
]}

Karnatak, Paritosh ^{[5
,8
]}

Ghosh, Arindam ^{[5
,6
]}

机构：

[1] Indian Inst Sci, Undergrad Programme, Bangalore 560012, Karnataka, India

[2] Indian Inst Sci Educ & Res IISER Kolkata, Dept Phys Sci, Nadia 741246, W Bengal, India

[3] Bangalore Univ, Dept Phys, Bangalore 560056, Karnataka, India

[4] Indian Inst Technol Guwahati, Dept Phys, Gauhati 781039, Assam, India

[5] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[6] Indian Inst Sci, Ctr Nano Sci & Engn, Bangalore 560012, Karnataka, India

[7] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA

[8] Univ Basel, Dept Phys, Klingelbergstr 82, CH-4056 Basel, Switzerland

来源：

NANOTECHNOLOGY | 2019年 / 30卷 / 39期

关键词：

visibility; graphene; van der Waal heterostructures; OPTICAL-PROPERTIES; CONTRAST; THICKNESS; FERROMAGNETISM; OPPORTUNITIES;

D O I：

10.1088/1361-6528/ab2d88

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页数：7

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