Photonics with multiwall carbon nanotube arrays

  • Lidorikis E
  • Ferrari A
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We investigate the photonic properties of two-dimensional nanotube arrays for photon energies up to 40 eV and unveil the physics of two distinct applications: deep-UV photonic crystals and total visible absorbers. We find three main regimes: for small intertube spacing of 20?30 nm, we obtain strong Bragg scattering and photonic band gaps in the deep-UV range of 25?35 eV. For intermediate spacing of 40?100 nm, the photonic bands anticross with the graphite plasmon bands resulting into a complex photonic structure, and a generally reduced Bragg scattering. For large spacing >150 nm, the Bragg gap moves into the visible and decreases due to absorption. This leads to nanotube arrays behaving as total optical absorbers. Our results can guide the design of photonic applications in the visible and deep UV ranges.

Author-supplied keywords

  • Carbon nanotube
  • Deep UV photonics
  • Effective medium theory
  • Nanotube array
  • Photonic crystal
  • Ultrablack materials

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  • Elefterios Lidorikis

  • Andrea C. Ferrari

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