Multiwall carbon nanotube microcavity arrays

Ahmed, R. and Rifat, A.A. and Yetisen, A.K. and Dai, Q. and Yun, S.H. and Butt, H. (2016) Multiwall carbon nanotube microcavity arrays. Journal of Applied Physics, 119 (11). p. 113105. ISSN 0021-8979, DOI

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Periodic highly dense multi-wall carbon nanotube (MWCNT) arrays can act as photonic materials exhibiting band gaps in the visible regime and beyond terahertz range. MWCNT arrays in square arrangement for nanoscale lattice constants can be configured as a microcavity with predictable resonance frequencies. Here, computational analyses of compact square microcavities (≈0.8 × 0.8 μm2) in MWCNT arrays were demonstrated to obtain enhanced quality factors (≈170-180) and narrow-band resonance peaks. Cavity resonances were rationally designed and optimized (nanotube geometry and cavity size) with finite element method. Series (1 × 2 and 1 × 3) and parallel (2 × 1 and 3 × 1) combinations of microcavities were modeled and resonance modes were analyzed. Higher order MWCNT microcavities showed enhanced resonance modes, which were red shifted with increasing Q-factors. Parallel microcavity geometries were also optimized to obtain narrow-band tunable filtering in low-loss communication windows (810, 1336, and 1558 nm). Compact series and parallel MWCNT microcavity arrays may have applications in optical filters and miniaturized optical communication devices.

Item Type: Article
Uncontrolled Keywords: Carbon nanotubes; Energy gap; Finite element method; Lattice constants; Microcavities; Nanotubes; Optical communication; Q factor measurement; Resonance; Yarn
Subjects: R Medicine
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 08 Nov 2017 02:02
Last Modified: 08 Nov 2017 02:02

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