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Keywords:

  • multi-walled carbon nanotubes;
  • chemical vapor deposition;
  • membranes;
  • broadband optical polarisors;
  • horizontal alignment
Thumbnail image of graphical abstract

A carbon nanotube free-standing linearly dichroic polariser is developed using solid-state extrusion. Membrane cohesion is experimentally and numerically demonstrated to derive from inter-tube van der Waals interactions in this family of planar metastable morphologies, controlled by the chemical vapour deposition conditions. Ultra-broadband polarisation (400 nm – 2.5 mm) is shown and corroborated by effective medium and full numerical simulations.