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首页> 外文期刊>Laser & photonics reviews >Group-Velocity-Controlled and Gate-Tunable Directional Excitation of Polaritons in Graphene-Boron Nitride Heterostructures
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Group-Velocity-Controlled and Gate-Tunable Directional Excitation of Polaritons in Graphene-Boron Nitride Heterostructures

机译：石墨烯-氮化硼异质结构中极化子的群速度控制和门可调定向激励

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摘要

A fundamental building block in nano-photonics is the ability to directionally excite highly squeezed optical mode dynamically, particularly with an electrical bias. Such capabilities would enable the active manipulation of light propagation for information processing and transfer. However, when the optical source is built-in, it remains challenging to steer the excitation directionality in a flexible way. Here, a mechanism is revealed for tunable directional excitation of highly squeezed polaritons in graphene-hexagonal boron nitride (hBN) heterostructures. The effect relies on controlling the sign of the group velocity of the coupled plasmon-phonon polaritons, which can be flipped by simply tuning the chemical potential of graphene (through electrostatic gating) in the heterostructures. Graphene-hBN heterostructures thus present a promising platform toward nano-photonic circuits and nano-devices with electrically reconfigurable functionalities.
机译：纳米光子学的基本构建模块是能够动态定向定向激发高度压缩的光学模式的能力，特别是在电偏压下。这样的能力将使得能够主动操纵光传播以进行信息处理和传递。但是，当内置光源时，以灵活的方式控制激发方向性仍然具有挑战性。在这里，揭示了一种机制，用于石墨烯-六方氮化硼（hBN）异质结构中高度压缩的极化子的可调方向激发。该效果取决于控制耦合的等离激元-声子极化子的群速度的符号，可以通过简单地调整异质结构中石墨烯的化学势（通过静电门控）来翻转。因此，石墨烯-hBN异质结构为具有光可重构功能的纳米光子电路和纳米器件提供了一个有前途的平台。

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  • 来源
    《Laser & photonics reviews》 |2018年第5期|1800049.1-1800049.5|共5页
  • 作者

    Jiang Yuyu; Lin Xiao; Low Tony; Zhang Baile; Chen Hongsheng;

  • 作者单位

    Zhejiang Univ, Electromagnet Acad, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China;

    Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore;

    Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA;

    Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore;

    Zhejiang Univ, Electromagnet Acad, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    directional excitation; graphene-hBN heterostructures; plasmon-phonon polaritons;

    机译：定向激发石墨烯-hBN异质结构等离子体激元-声子极化子;

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