Multiwall carbon nanotube microcavity arrays

Research output: Contribution to journalArticlepeer-review

Authors

  • Ahmmed A. Rifat
  • Qing Dai
  • Seok Hyun Yun

Colleges, School and Institutes

External organisations

  • Nanotechnology Laboratory, School of Mechanical Engineering, University of Birmingham, Birmingham B15 2TT, United Kingdom
  • Integrated Lightwave Research Group, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
  • Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • National Center for Nanoscience and Technology, Beijing 100190, China

Abstract

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 MWCNTmicrocavities 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 MWCNTmicrocavity arrays may have applications in optical filters and miniaturized optical communication devices.

Details

Original languageEnglish
Article number113105
JournalJournal of Applied Physics
Volume119
Issue number11
Publication statusPublished - 21 Mar 2016