Vector plasmonic lattice solitons in nonlinear graphene-pair arrays.
Vector plasmonic lattice solitons in nonlinear graphene-pair arrays.
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DOI：
10.1364/ol.41.003619
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发表时间：
2016-08
期刊：
影响因子：
3.6
通讯作者：
Zhouqing Wang;B. Wang;Kai Wang;H. Long;P. Lu
中科院分区：
文献类型：
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作者：
Zhouqing Wang;B. Wang;Kai Wang;H. Long;P. Lu
我们研究了由周期性排列的双石墨烯片组成的非线性石墨烯对阵列中的矢量等离子体晶格孤子。由于石墨烯对之间的表面等离子体激元(SPP)的耦合，阵列中的Bloch模有两个色散带。由两个分量组成的矢量PLSS起源于不同频带的Bloch模的非线性相互作用。通过石墨烯的衍射和自聚焦非线性之间的平衡，这两个组分都经历了相互的自陷。由于表面等离子体激元的强烈限制，矢量PLSS可以被压缩到∼λ/100的横向宽度。该研究为在深亚波长尺度上实现全光控制提供了一条很有前途的途径。
We investigate the vector plasmonic lattice solitons (PLSs) in nonlinear graphene-pair arrays (GPAs) consisting of periodically arranged double graphene sheets, which are spatially separated. There are two dispersion bands for the Bloch modes in the array due to the coupling of surface plasmon polaritons (SPPs) between the graphene pairs. The vector PLSs composed of two components originate from the nonlinear interaction of Bloch modes in different bands. Both components undergo mutual self-trapping through the balance between diffraction and self-focusing nonlinearity of graphene. Thanks to the strong confinement of SPPs, the vector PLSs can be squeezed into a lateral width of ∼λ/100. The study provides a promising approach to all-optical control on a deep-subwavelength scale.