Nonlinear Optical Transmission of Nanographene and Its Composites

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• 作者：Boshan Zhao ; Baobao Cao ; Weilie Zhou ; Dan Li ; Wei Zhao
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：July 29, 2010
• 年：2010
• 卷：114
• 期：29
• 页码：12517-12523
• 全文大小：360K
• 年卷期：v.114,no.29(July 29, 2010)
• ISSN：1932-7455

文摘

Low-cost broad-band optical limiters based on nanographene have been studied, finding optical-limiting properties superior to those of current standards, carbon fullerenes (C₆₀) solutions and carbon black suspensions. Further examination indicates that the presence of π conjugation improves the optical-limiting responses. Superior limiting performance is retained regardless of solvent viscosity and polarity, a unique feature of graphene not observed in C₆₀ and carbon black. Graphene suspensions in organic solvents can work under 10 Hz laser pulses without losing excellent limiting performance. More significantly, outstanding limiting properties are also preserved in a gel matrix. These nanographene-based optical limiters can thus work in solutions and solid matrixes for devices used for protecting human eyes and optical sensors from high-power lasers.