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Optical Bandgap Modelling from Structural Arrangement of Carbon Nanotubes

Abstract

Optical bandgap properties of vertically aligned car nanotube (VACNT) array were probed through its interaction with white light, with the light reflected from the rotating arrays measured by a spectrometer. The precise deterministic control over the structure of vertically-aligned carbon nanotube arrays through electron beam lithography and well-controlled growth conditions brings with it the ability to produce exotic photonic crystals over a relatively large area. The characterisation of the behaviour of these materials in the presence of light is a necessary first step toward application. Relatively large area array structures of high quality VACNTs were fabricated in square, hexagonal, circular and pseudorandom patterned arrays with length scales on the order of those of visible light for the purpose of investigating how they may be used to manipulate an impinging light beam. In order to investigate the optical properties of these arrays a set of measurement apparatus was designed which allowed accurate measurement of their optical bandgap characteristics. Patterned samples were rotated under the illuminating white light beam, revealing interesting optical bandgap results caused by the changing patterns and relative positions of the scatterering elements (VACNTs).

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Publication details

The article was received on 22 Dec 2017, accepted on 08 May 2018 and first published on 09 May 2018


Article type: Paper
DOI: 10.1039/C7NR09567H
Citation: Nanoscale, 2018, Accepted Manuscript
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    Optical Bandgap Modelling from Structural Arrangement of Carbon Nanotubes

    T. P. Butler, I. Rashid, Y. Montelongo, G. A. J. Amaratunga and H. Butt, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR09567H

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