Wang Lei, Cai Wei, Luo Weiwei, Ma Zenghong, Du Chenglin, Zhang Xinzheng, Xu Jingjun
Opt Express. 2014 Dec 29;22(26):32450-6. doi: 10.1364/OE.22.032450.
The control of coherent phenomena in graphene structures is proposed. Specifically, plasmon induced transparency (PIT) effect is investigated in a kind of simple graphene structures - graphene ribbon pairs. The transparency effect are understood by the mode coupling between dipolar and quadrupole plasmons modes in graphene ribbons. By using bias voltage tuning or geometry parameters changing, the PIT effect can be effectively controlled, which is based on the frequency tuning of dipolar or quadrupole modes in ribbons. These properties make these structures possess applications in two-dimensional plasmonics devices in mid-infrared range. In addition, the tuning of PIT in graphene ribbon pairs opens an avenue for active coherent control in plasmonics.
提出了对石墨烯结构中相干现象的控制方法。具体而言，研究了一种简单的石墨烯结构——石墨烯带对中的等离激元诱导透明（PIT）效应。通过石墨烯带中偶极子等离激元模式和四极子等离激元模式之间的模式耦合来理解这种透明效应。通过施加偏置电压调谐或改变几何参数，可以基于带中偶极子或四极子模式的频率调谐有效地控制PIT效应。这些特性使得这些结构在中红外范围内的二维等离激元器件中具有应用价值。此外，石墨烯带对中PIT的调谐为等离激元学中的主动相干控制开辟了一条途径。
