Dynamical Tuning of Graphene Plasmonic Resonances byUltraviolet Illuminations
Dynamical Tuning of Graphene Plasmonic Resonances byUltraviolet Illuminations
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DOI：
10.1002/adom.201701081
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发表时间：
2018-03-19
影响因子：
9
通讯作者：
Zi, Jian
中科院分区：
文献类型：
--
作者：
Dai, Yunyun;Xia, Yuyu;Zi, Jian
石墨烯结构中等离子共振的独特特征之一是通过外部手段实现可调性。目前，电门控被广泛用于石墨烯等离子体共振调谐。然而，不幸的是，这种方法仅限于具有电连接的石墨烯结构。本文展示了一种简单而有效的方法，通过紫外照明以动态和可逆的方式调谐石墨烯等离子体共振。它是一种纯粹的光学手段，可以应用于各种石墨烯结构，而不需要引入电门控所需的电极、离子凝胶或导电层，这对孤立的石墨烯结构具有重要意义。这种光学调谐方法可以为基于石墨烯的可调谐器件提供新的思路。
One of the unique features of plasmonic resonances in graphene structures is the enabled tunability through external means. Up to now, electrical gating is extensively adopted to tune graphene plasmonic resonances. This method is, however, limited unfortunately only to graphene structures with electrical connections. Here, a simple and efficient method to tune graphene plasmonic resonances by ultraviolet illuminations in a dynamical and reversible way is demonstrated. It is purely an optical means and can be applied to all kinds of graphene structures without introducing electrodes, ion-gel, or conducting layers required in electrical gating, which is of great significance especially for isolated graphene structures. The optical tuning method could shed new light on graphene-based tunable devices.