A. Chelnokov

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We report on the collective integration technology of vertically aligned nanowires (NWs). Si and ZnO NWs have been used in order to develop a generic technological process. Both mineral and organic planarizations of the as-grown nanowires have been achieved. Chemical vapour deposition (CVD) oxides, spin on glass (SOG), and polymer have been investigated as(More)
Various high-index-contrast sub-wavelength grating (HCG) mirror designs have been investigated. It reveals that transverse magnetic (TM-) and transverse electric (TE-) HCG reflect the incident fields in quite different ways and that the TM-HCG enables very thin gap below the grating. Based on these results, a new HCG VCSEL design with a thin oxide gap has(More)
We present a theoretical study of new two-dimensional photonic crystals based on Archimedean-like tilings. Three structures are considered: a square lattice with a 4-atom unit cell and triangular lattices with 7- and 13-atom unit cells. A 12-fold local rotational symmetry is obtained for the triangular lattices and is approached for the square lattice. Wide(More)
Distal tibia fractures are one of the most demanding injuries in orthopaedic traumatology, due mainly to frequent coexistence of covering tissue problems and poor blood supply. Smoking exerts a detrimental effect on fracture healing, increasing the time to union. We report the case of a 60-year-old heavy-smoker (about 20 cigarettes a day) with a distal(More)
We report on the integration and characterizations of vertically aligned ZnO nanowires (NWs). Technological processes have been developed both for mineral and organic planarizations with suitable morphologies. Optical and electrical characterizations of these integrated NWs have been performed. A comparison of the photoluminescence (PL) spectra at 300K of(More)
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