CARTOON (CARbon nanoTube phOtONic devices on silicon) is an european research project (FP7-ICT-2013-C) coordinated by the University of Paris Sud (France), in collaboration with the University of Florence (Italy), the Dresden University of Technology (Germany), the Atomic Energy and Alternative Energies Commission (CEA, France) and the National Centre for Scientific Research (CNRS, France). The primary goal of the CARTOON project is the development of a novel strategy for hybridizing silicon based photonic devices, exploiting semiconducting carbon nanotubes (CNT) as integrated light source, modulator and detector.
DeLIGHTeD (Deterministic coupling between site-controlled, nanometer-sized LIGHT emitters and photonic crystal structures Designed from first principles) is an italian research project (FIRB RBFR12RS1W_003) coordinated by the Sapienza - University of Rome (Italy), in collaboration with the University of Florence (Italy) and the Institute for photonics and nanotechnologies (IFN) of the National Research Council (CNR, Italy). The aim of the DeLIGHTeD project is the integration of GaAsN quantum dot with photonic crystal cavities in order to make complex photonic devices like single- and entangled-photon sources as well as single-photon routers, switches, and delay lines, which are fundamental for the practical implementation of quantum computing schemes. One of the cornerstones of the project is represented by the fabrication method of the GaAsN quantum dot, a site-controlled method based on the hydrogen-induced passivation of N atoms in dilute-nitride semiconductors.
ExcNiNa (Exciton dynamics in Nitride based Nanostructures) is a research activity based on an Italian research project, arising from two PRIN2009 (PRIN2009XXX) with the group of Prof. Enrico Zanoni at UNIPD dedicated to optimization of InGaN LED. In addition we have a long lasting international collaboration with the growth group of Prof. Nicolas Grandjean at EPFL (Lausanne). Relevant achievements have been the determination of the joint impact of quantum confinement and quantum confined Stark effect on biexcitons in high quality GaN/AlGaN quantum wells, the understanding of the recombination dynamics of the A and B excitons and their interaction, the investigation of the thermal and non thermal regimes in the large k-exciton dynamics in GaN epilayers. At present we are addressing the study of the exciton-phonon interaction in GaN bidimensional systems.
QuEmSi (Quantum Emitters on Silicon) is an Italian research project, arising from the PRIN2008 (PRIN2008CH5N34). It follows a long lasting collaboration with the MBE growth team of Prof. Stefano Sanguinetti at the LNESS (Como). The idea is insertion of selected quantum photonic devices and circuits into the realm of integrated circuit (IC) microelectronics. We did develop quantum emitters on Silicon-Germanium substrates obtained by means of IC compatible fabrication protocols leading to antibunching up to temperature of liquid nitrogen (T=80 K). The next step was to exploit Ge impurities on AlGaAs layers growth on top of Silicon as single photon and entangled photon pair emitters. Currently the focus is on the direct growth of III-V layers with good optical properties on top of patterned silicon substrates.
NanIm (Nano-Imaging with SNOM) started with the Italian project PRIN2008 (PRIN2008H9ZAZR). It is currently the core activity of the Nanophotonic Laboratory which spans over several projects and different international collaborations, such as Prof. Andrea Fiore (TUe Eindhoven), Prof. Luca DalNegro (Boston), Dr. Silvia Vignolini (Cambridge), Prof. Laurent Vivien (IEF Paris), and Prof. Nicolas Grandjean (EPFL Lausanne). Several highlights have been obtained such as the deep subwavelength mapping of the LDOS of nanoresonators, the magnetic imaging, and the mode delocalization in photonic molecules. Recently we developed a phase sensitive novel imaging method based on the resonant scattering and Fano lineshape, leading to the possibility of mapping Silicon/Polymer/Glass/Metal nanoresonators.
PlasTip (Plasmonic Tips for nano-optics) is a joint project with Dr. Alex Bargioni (Berkley) devoted to develop high resolution and high sensitive SNOM-tips for enhancing both the sensitivity and the resolution of near field detection. A campanile tip exploiting the double surface plasmon, the adiabatic compression and the bow tie concepts has been designed, nanofabricated and successfully tested. Very recently we exploit the seminal idea of LC analogous of any plasmonic antenna, for demonstrating the possibility of a concomitant imaging of the electric and magnetic field in a nanocavity.
MagPla (Magnetic Plasmonic) is a project based on collaboration with the group of LAMM (Laboratorio di Magnetismo Molecolar) at the department of Chemistry with Prof. Andrea Caneschi, Prof. Roberta Sessoli and Dr. Francesco Pineider who actually leads the activity. In the past we applied magneto-optics experiments to magnetic molecules Mn12 into different non-crystalline environments and to magnetic nanoparticles and Nano-Stabilized Au:Fe superparamagnetic nanoparticles, just to quote two highlights. Recently we addressed the novel field of magnetic effect on surface plasmon polariton in Au spherical nanoparticles, observing a spin-polarization transfer across colloidal magneto-plasmonic . In progress are experiments on Ag and elongated nanoparticles.
DisPhC (Disordered Photonic Crystal and mode engineering) is a scientific project aimed to exploit the tuning protocols developed in the Nanophotonic lab for engineering and control the quasimode present in disordered photonic systems. It is a joint collaboration with Dr. Francesco Riboli (UniTN) and Prof. Diederik Wiersma (LENS). Recently we demonstrated the capability to tune random modes by microoxidation induced by laser exposition up to bring two of them into strong coupling condition. Currently we focus our attention on the imaging of random mode and on the realization of necklace states.