Armando Cosentino | Istituto Italiano di Tecnologia / Italian Institute of Technology (original) (raw)
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Papers by Armando Cosentino
Journal of The European Optical Society-rapid Publications, 2010
We report on the fabrication and optical characterization of a switchable photonic crystal nanoca... more We report on the fabrication and optical characterization of a switchable photonic crystal nanocavity actuated by liquid crystals. This device acts as a filter presenting a transmission peak around the telecom wavelength λ = 1550 nm. Passing from the isotropic to the anisotropic (oriented crystals) state of the liquid crystals, a shift of ∆λ = 13 nm has been measured, which confirms the theoretical predictions obtained by finite difference time domain simulations. We have developed a photonic crystal nanocavity that can be tuned thanks to the properties of liquid crystals infiltrated in the holes of the photonic device.
Journal of The Optical Society of America, 2011
We present the simulation, fabrication, and characterization of a metallic slot grating on a sili... more We present the simulation, fabrication, and characterization of a metallic slot grating on a silicon waveguide (30 nm slot width for a period of 500 nm). According to the simulation, the experimental measured spectrum of the structure exhibits a dip in the near-infrared region. Moreover, the finite-difference time-domain simulation shows that this device can be used as a sensor, due to its high sensitivity to the refractive index variation of the medium above and inside the cavity (η ¼ Δλ=Δn ¼ 750 nm=refractive index unit).
ABSTRACT The simulation, fabrication and characterization of a metallic slot grating on a silicon... more ABSTRACT The simulation, fabrication and characterization of a metallic slot grating on a silicon waveguide (30 nm slot width for a period of 500 nm) are presented [1]. This device is attempting to be a sensor for refractive index variation measurements with theoretically expected sensitivity of 750 nm/RIU (Refractive Index Unit).
Journal of The European Optical Society-rapid Publications, 2010
We report on the fabrication and optical characterization of a switchable photonic crystal nanoca... more We report on the fabrication and optical characterization of a switchable photonic crystal nanocavity actuated by liquid crystals. This device acts as a filter presenting a transmission peak around the telecom wavelength λ = 1550 nm. Passing from the isotropic to the anisotropic (oriented crystals) state of the liquid crystals, a shift of ∆λ = 13 nm has been measured, which confirms the theoretical predictions obtained by finite difference time domain simulations. We have developed a photonic crystal nanocavity that can be tuned thanks to the properties of liquid crystals infiltrated in the holes of the photonic device.
Journal of The Optical Society of America, 2011
We present the simulation, fabrication, and characterization of a metallic slot grating on a sili... more We present the simulation, fabrication, and characterization of a metallic slot grating on a silicon waveguide (30 nm slot width for a period of 500 nm). According to the simulation, the experimental measured spectrum of the structure exhibits a dip in the near-infrared region. Moreover, the finite-difference time-domain simulation shows that this device can be used as a sensor, due to its high sensitivity to the refractive index variation of the medium above and inside the cavity (η ¼ Δλ=Δn ¼ 750 nm=refractive index unit).
ABSTRACT The simulation, fabrication and characterization of a metallic slot grating on a silicon... more ABSTRACT The simulation, fabrication and characterization of a metallic slot grating on a silicon waveguide (30 nm slot width for a period of 500 nm) are presented [1]. This device is attempting to be a sensor for refractive index variation measurements with theoretically expected sensitivity of 750 nm/RIU (Refractive Index Unit).