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首页> 外文期刊>Physical review >Tunable omnidirectional strong light-matter interactions mediated by graphene surface plasmons
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Tunable omnidirectional strong light-matter interactions mediated by graphene surface plasmons

机译：石墨烯表面等离子体激元介导的可调全向强光物质相互作用

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摘要

In this theoretical work, we report on voltage-controllable hybridization of electromagnetic modes arising from strong interaction between graphene surface plasmons and molecular vibrations. The interaction strength depends strongly on the volume density of molecular dipoles, the molecular relaxation time, and the molecular layer thickness. Graphene offers much tighter plasmonic field confinement and longer carrier relaxation time compared to noble metals, leading to Rabi splitting and hybridized polaritonic modes at three-orders-of-magnitude lower molecular densities. Electrostatically tunable carrier density in graphene allows for dynamic control over the interaction strength. In addition, the flat dispersion band above the light line arising from the deep confinement of the polaritonic modes gives rise to the omnidirectional excitation. Our approach is promising for practical implementations in infrared sensing and detection.
机译：在这项理论工作中，我们报告了由于石墨烯表面等离子体激元与分子振动之​​间的强相互作用而引起的电磁模式的电压可控杂交。相互作用强度在很大程度上取决于分子偶极子的体积密度，分子弛豫时间和分子层厚度。与贵金属相比，石墨烯提供更紧密的等离子体场约束和更长的载流子弛豫时间，从而在较低的三个数量级的分子密度下导致Rabi分裂和杂化极化模式。石墨烯中的静电可调载流子密度允许动态控制相互作用强度。另外，由于极化子模的深度限制而引起的光线上方的平坦色散带引起全向激发。我们的方法有望用于红外传感和检测的实际实现。

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  • 来源
    《Physical review》 |2013年第11期|115439.1-115439.6|共6页
  • 作者

    Feng Liu; Ertugrul Cubukcu;

  • 作者单位

    Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia 19104, USA Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China;

    Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia 19104, USA;

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