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.

Floris, F., Fornasari, L., Marini, A., Bellani, V., Banfi, F., Roddaro, S., Ercolani, D., Rocci, M., Beltram, F., Cecchini, M., Sorba, L., Rossella, F., Self-assembled InAs nanowires as optical reflectors, <<NANOMATERIALS>>, 2017; 7 (11): N/A-N/A. [doi:10.3390/nano7110400] [http://hdl.handle.net/10807/110184]

Self-assembled InAs nanowires as optical reflectors

Floris, Francesco;Banfi, Francesco;Roddaro, Stefano;Sorba, Lucia;
2017

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.
2017
Inglese
Fundings Agencies: MIUR through the program "Fondo per gli Investimenti della Ricerca di Base (FIRB)-Futuro in Ricerca"
Floris, F., Fornasari, L., Marini, A., Bellani, V., Banfi, F., Roddaro, S., Ercolani, D., Rocci, M., Beltram, F., Cecchini, M., Sorba, L., Rossella, F., Self-assembled InAs nanowires as optical reflectors, <<NANOMATERIALS>>, 2017; 7 (11): N/A-N/A. [doi:10.3390/nano7110400] [http://hdl.handle.net/10807/110184]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10807/110184
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