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首页> 外文会议>2016 IEEE Optoelectronics Global Conference >Mid-infrared biosensing with tunable graphene plasmons
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Mid-infrared biosensing with tunable graphene plasmons

机译：可调谐石墨烯等离子体激元的中红外生物传感

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摘要

Mid-Infrared (mid-IR) spectroscopy has been widely used to identify biomolecules. Due to the general poor interaction of mid-IR light with nanometric-scale molecules, the electro-optical properties of graphene resonant plasmons based device is exploited to demonstrate a tunable label-free protein sensor with high sensitivity. The confinement of graphene plasmons is much larger than that of the conventional metallic structure due to the two-dimensional nature of the collective oscillations of Dirac quasi-particles. The localized graphene plasmons can dynamically produce a high light overlap with nanometer size biomolecules, which plays an essential role in the resulted super sensitivity in the detection of the protein's permittivity. Furthermore, graphene plasmons merge optics with electronics which provide a unique capacity to control light in nanoscale. Tunable resonant spectra selectivity combined with the super ambient condition sensitivity promise the graphene plasmons based device exciting prospects in future nanoscale biosensing.
机译：中红外（mid-IR）光谱已被广泛用于鉴定生物分子。由于中红外光与纳米级分子的相互作用通常较差，因此利用基于石墨烯共振等离子体激元的器件的电光性能来证明具有高灵敏度的可调谐无标记蛋白质传感器。由于狄拉克准粒子集体振动的二维性质，石墨烯等离子体激元的约束比常规金属结构的约束大得多。本地化的石墨烯等离子体激元可以动态产生与纳米级生物分子的高光重叠，这在蛋白质介电常数检测中所产生的超高灵敏度中起着至关重要的作用。此外，石墨烯等离子体激元将光学器件与电子器件融合在一起，提供了独特的能力来控制纳米级的光。可调谐的共振光谱选择性与超强的环境条件灵敏度相结合，有望在未来的纳米级生物传感中使基于石墨烯等离激元的器件令人兴奋。

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