Plasmonic Band Gaps and Waveguide Effects in Carbon Nanotube Arrays Based Metamaterials

被引:33
作者
Butt, Haider [1 ]
Dai, Qing [1 ]
Rajesekharan, Ranjith [1 ]
Wilkinson, Timothy D. [1 ]
Amaratunga, Gehan A. J. [1 ,2 ]
机构
[1] Univ Cambridge, Elect Engn Div, Dept Engn, Cambridge CB3 0FA, England
[2] Sri Lanka Inst Nanotechnol SLINTEC, EPZ, Biyagama, Sri Lanka
基金
英国工程与自然科学研究理事会;
关键词
metamaterials; carbon nanotube arrays; plasmonic band gaps; optical waveguides; OPTICAL-PROPERTIES; GROWTH;
D O I
10.1021/nn203363x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Highly dense periodic arrays of multiwalled carbon nanotubes behave like low-density plasma of very heavy charged particles, acting as metamaterials. These arrays with nanoscale lattice constants can be designed to display extended plasmonic band gaps within the optical regime, encompassing the crucial optical windows (850 and 1550 nm) simultaneously. We demonstrate an interesting metamaterial waveguide effect displayed by these nanotube arrays containing line defects. The nanotube arrays with lattice constants of 400 nm and radius of 50 nm were studied. Reflection experiments conducted on the nanoscale structures were in agreement with numerical calculations.
引用
收藏
页码:9138 / 9143
页数:6
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