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7 March 2014 Novel approaches to enhance graphene absorption and electro-optic property
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We demonstrate greatly enhanced light absorption by monolayer graphene over a broad spectral range, from visible to near infrared, based on attenuated total reflection (ATR). The designed structure consists of two dielectric media and monolayer graphene between them. Up to 42.7% light absorption has been achieved by this structure. Moreover, when applying electrolyte gel, electric double layers are formed at the graphene-gel interface, which leads to the change of graphene’s electrical properties as well as optical properties. As a result, light absorption of graphene can be manually modulated. This design may help build electro-optic modulators for applications in communications, sensing and spectroscopy.
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Kaifeng Shi, Wangshi Zhao, Binying Zhao, and Zhaolin Lu "Novel approaches to enhance graphene absorption and electro-optic property", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 89801C (7 March 2014);

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