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Open AccessDirective giant upconversion by supercritical bound states in the continuum
Photonic bound states in the continuum (BICs), embedded in the spectrum of free-space waves1,2 with diverging radiative quality factor, are topologically non-trivial dark modes in open-cavity resonators that have...
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Article
Open AccessReduced graphene oxide on silicon-based structure as novel broadband photodetector
Heterojunction photodetector based on reduced graphene oxide (rGO) has been realized using a spin coating technique. The electrical and optical characterization of bare GO and thermally reduced GO thin films d...
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Article
Open AccessDiatomite silica nanoparticles for drug delivery
Diatomite is a natural fossil material of sedimentary origin, constituted by fragments of diatom siliceous skeletons. In this preliminary work, the properties of diatomite nanoparticles as potential system for...
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Article
Open AccessSynthesis of mixed-sequence oligonucleotides on mesoporous silicon: chemical strategies and material stability
Rapid screening tests in medical diagnostic and environmental analysis are often based on oligonucleotide biochips. In this paper, we studied the stability of functionalized mesoporous silicon supports in the ...
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Article
Open AccessGuided resonance in negative index photonic crystals: a new approach
The behavior of a negative refraction photonic crystal slab irradiated with out-of-plane incident beam is an unexplored subject. In such an experimental configuration, guided mode resonance appears in the refl...
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Article
Open AccessEllipsometric determination of permittivity in a negative index photonic crystal metamaterial
In this work, we present the first experimental evidence of negative dielectric susceptibility in a two-dimensional silicon photonic crystal (PhC) with negative refractive index behavior. In the frequency rang...
