Nanostructure surface design for broadband and angle-independent antireflection

Yi Fan Huang, Surojit Chattopadhyay

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Three different antireflecting structures (ARS), namely, single-diameter nanorods, dual-diameter nanorods, and biomimetic nanotips (resembling moth-eye's submicrostructures) were compared to each other analytically for their reflectivities, using finite difference time domain calculations. Simulation results establish the biomimetic nanotips as better ARS than the others, in the visible and near-infrared wavelength zone and over a wider angle of incidence. The reflectance values in the nanotips are significantly lower compared to both types of nanorods and also the planar silicon below the Brewster angle (∼75 deg). The low antireflection translated to enhanced optical absorption in these subwavelength structures. A general antireflection design rule emerged from the simulation results.

Original languageEnglish
Article number12129PSS
JournalJournal of Nanophotonics
Issue number1
StatePublished - 2013


  • antireflection
  • biomimetic
  • finite difference time domain
  • gradient refractive index
  • photonic


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