Localized plasmons induced by spatial conductivity modulation in graphene
Localized plasmons induced by spatial conductivity modulation in graphene
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DOI：
10.1364/josab.33.002051
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发表时间：
2016-03
影响因子：
1.9
通讯作者：
Chris Beckerleg;E. Hendry
中科院分区：
文献类型：
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作者：
Chris Beckerleg;E. Hendry
使用分析建模研究了在单层和双层石墨烯的电导率中诱导一维周期性调制的效果。通过采用模式匹配的方法，我们发现深传输最小值与低和高电导率区域支持的模式的杂交共振。通过仔细调整的电导率分布，我们表明，增加，接近50%，可以实现在共振吸收时，这两个地区的偶极共振。这种等离子体腔可能是消除蚀刻石墨烯时通常引入的等离子体损耗的有希望的途径。
The effect of inducing a one-dimensional periodic modulation in the conductivity of both a single and double layer of graphene is investigated using analytical modeling. By employing a modal matching approach, we find deep transmission minimums associated with hybridized resonances of the modes supported by low- and high-conductivity regions. By carefully tuning the conductivity profile, we show that an increase, approaching 50%, can be achieved in the resonant absorption when both regions are made dipole resonant. Such plasmonic cavities may be a promising route to eliminating plasmonic losses typically introduced when etching graphene.