SEARCH

SEARCH BY CITATION

Keywords:

  • carbon nanotubes;
  • fresnel lens;
  • diffraction;
  • extremely black objects;
  • zones
Thumbnail image of graphical abstract

Reflective binary Fresnel lenses fabricated so far all suffer from reflections from the opaque zones and hence degradation in focusing and lensing properties. Here a solution is found to this problem by developing a carbon nanotube Fresnel lens, where the darkest man-made material ever, i.e., low-density vertically aligned carbon nanotube arrays, are exploited.