Self-assembled InAs nanowires as optical reflectors

Francesco Banfi, Francesco Floris, Stefano Roddaro, Lucia Sorba, Lucia Fornasari, Andrea Marini, Vittorio Bellani, Daniele Ercolani, Mirko Rocci, Fabio Beltram, Marco Cecchini, Francesco Rossella

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Subwavelength nanostructured surfaces are realized with self-assembled vertically-aligned InAs nanowires, and their functionalities as optical reflectors are investigated. In our system, polarization-resolved specular reflectance displays strong modulations as a function of incident photon energy and angle. An effective-medium model allows one to rationalize the experimental findings in the long wavelength regime, whereas numerical simulations fully reproduce the experimental outcomes in the entire frequency range. The impact of the refractive index of the medium surrounding the nanostructure assembly on the reflectance was estimated. In view of the present results, sensing schemes compatible with microfluidic technologies and routes to innovative nanowire-based optical elements are discussed.
Original languageEnglish
Pages (from-to)N/A-N/A
Publication statusPublished - 2017


  • Chemical Engineering (all)
  • Materials Science (all)
  • Nanostructured optical surface
  • Semiconductor nanowire
  • Sensing
  • Specular reflectance
  • Sub-wavelength nanostructures


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