Metasurfaces for suppressing reflection over broadband

  title={Metasurfaces for suppressing reflection over broadband},
  author={Anuradha Patra and Ajith P. Ravishankar and Arvind Nagarajan and Venu Gopal Achanta},
Surfaces patterned with arrays of quasi-periodic air holes having conical depth profile have been studied for their effectiveness in suppressing air-substrate reflection in the wavelength range of 450-1350 nm (limited by our measurement). The role of quasi-periodic air-hole pattern, depth of holes and launch angle on the observed antireflection behavior are investigated. The average optical transmittance of the patterned quartz substrate at near normal incidence is more than 97% and reflectance… 
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