Strong enhancement of light absorption and highly directive thermal emission in graphene
Strong enhancement of light absorption and highly directive thermal emission in graphene
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DOI：
10.1364/oe.21.011618
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发表时间：
2013-05-20
期刊：
影响因子：
3.8
通讯作者：
Luo, Xiangang
中科院分区：
文献类型：
--
作者：
Pu, Mingbo;Chen, Po;Luo, Xiangang
石墨烯是一种二维材料，具有奇异的电子、光学和热学性质。单层石墨烯的光吸收受到精细结构常数a的限制。本文证明了均匀石墨烯的光吸收和热辐射的强增强。数值模拟表明，通过调节费米能量，可以将吸光率从接近零控制到100%。此外，在近掠入射处观察到一组周期性的吸收峰。基于这种独特的特性，在近红外频率下展示了高度定向的梳状热辐射。(C) 2013年美国光学学会
Graphene is a two-dimensional material with exotic electronic, optical and thermal properties. The optical absorption in monolayer graphene is limited by the fine structure constant a. Here we demonstrated the strong enhancement of light absorption and thermal radiation in homogeneous graphene. Numerical simulations show that the light absorbance can be controlled from near zero to 100% by tuning the Fermi energy. Moreover, a set of periodically located absorption peaks is observed at near grazing incidence. Based on this unique property, highly directive comb-like thermal radiation at near-infrared frequencies is demonstrated. (C) 2013 Optical Society of America