Optical contrast and clarity of graphene on an arbitrary substrate
Optical contrast and clarity of graphene on an arbitrary substrate
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DOI：
10.1063/1.3212735
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发表时间：
2009-08
影响因子：
4
通讯作者：
Xuefeng Wang;Ming Zhao;D. Nolte
中科院分区：
文献类型：
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作者：
Xuefeng Wang;Ming Zhao;D. Nolte
多层衬底上的分子薄介质膜可以看作是衬底反射系数r的附加扰动，其扰动仅取决于r和膜的光学性质。这个一般的结果适用于任意基板上的石墨烯的问题，寻求最大化的薄膜对比度。我们定义清晰度来描述在存在电荷耦合器件噪声的情况下的石墨烯图像质量。在大多数实际情况下，r=1的基底产生最高的石墨烯透明度。
A molecularly thin dielectric film on a multilayer substrate can be treated as an additive perturbation of the substrate reflection coefficient r, for which the perturbation depends only on r and the optical properties of the film. This general result is applied to the problem of graphene on arbitrary substrates that seek to maximize the film contrast. We define clarity to describe the graphene image quality in the presence of charge-coupled device noise. A substrate with r=1 produces the highest graphene clarity in most practical situations.