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Self-Assembled InAs Nanowires as Optical Reflectors.

ABSTRACT: 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.

SUBMITTER: Floris F

PROVIDER: S-EPMC5707617 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature

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Self-Assembled InAs Nanowires as Optical Reflectors.

Floris Francesco F Fornasari Lucia L Marini Andrea A Bellani Vittorio V Banfi Francesco F Roddaro Stefano S Ercolani Daniele D Rocci Mirko M Beltram Fabio F Cecchini Marco M Sorba Lucia L Rossella Francesco F

Nanomaterials (Basel, Switzerland) 20171121 11

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 ent ...[more]

PMID: 29160860

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