Plasmonic band gaps and waveguide effects in carbon nanotube arrays based metamaterials

Haider Butt, Qing Dai, Ranjith Rajesekharan, Timothy D. Wilkinson, Gehan A.J. Amaratunga

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


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.

Original languageBritish English
Pages (from-to)9138-9143
Number of pages6
JournalACS Nano
Issue number11
StatePublished - 22 Nov 2011


  • carbon nanotube arrays
  • metamaterials
  • optical waveguides
  • plasmonic band gaps


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