8/2009- Team Leader, Italian Institute of Technology, Center for Nanoscience and Technology
Study of the electronic and optical properties of semiconductor nanoparticles, and hybrid composites with organic molecular materials for photovoltaic applications. Ultra-fast optical characterization of charge-injection, diffusion and recombination dynamics in hybrid semiconductor-molecular and metal-molecular interfaces. Transport properties of photons in nanostructured solar cells, effects of diffusion and improvement of cell efficiencies.
2009, Collaborator, Dipartimento di Scienza dei Materiali, Università di Milano Bicocca:
Modeling light diffusion in polymeric composites embedding functional nanoparticles, including phosphors, for applications in coatings with optical functionalities and bulk materials for the illumination industry. Cordination of experimental and characterization activities.
2004-2008, research scientist, Pirelli Labs Optical Innovation, 1/2004-4/2008:
Proposed, set-up and coordinated large projects for the development of next generation tunable lasers with direct modulation at 10 gigabit per second, extended reach, based on hybrid integration of InP based gain media with silicon on insulator technology (SOI) planar light wave circuit (PLC). Chief technical reference for opto-electronic design of tunable external cavity laser in the Labs, chief reference for III-V semiconductor gain media. Responsible for competitor analysis in these areas. Design of SOI integrated optical components, realized in the labs. Developed free-space optical components for the coupling of fiber to active devices (lasers and photodiodes) using plastic molded lenses.
2000-2004, Research scientist, Pirelli Cavi e Sistemi Telecom, Fiber R&D:
Managed the product innovation area for fiber products, 4 projects, 3 researchers and fabrication at the manufacturing plant. Developmed advanced numerical modeling for micro structured fibers. Successful realization of first plastic micro structured fiber. Research on novel glasses for Raman amplification, on Rayleigh scattering properties of oxide glasses and modified silica. Set-up and coordinated 3 external research activities with universities, including modeling and measurements.
Stage in Hewlett-Packard Instrumentation and Photonics Laboratory, Palo Alto (U.S.A.) 10/1988-11/1988: Set-up a spectroscopic system for qualifying semiconductor lasers, including ultra-fast electronics and fiber optics. Modeling of planar waveguides for acousto-optic modulators.
Academic years 2005/2006, and 2006/2007. Professor, short course of computer aided optical design, University of Milan, Bicocca, Optics and optometry specialization course.
1999-2000: Post-doctoral fellow in the International School for Advanced Studies, Trieste: molecular dynamics, electronic structure calculations of carbon dioxide under ultra-high pressures. Discovered a bi-molecular state with Raman spectra signatures, experimentally observed in the products of carbon combustion under ultra-high pressures.
1996-1999 Post-doctoral fellow in Stanford University: transport of quantum fluids in low-dimensional semiconductors at ultra-low temperatures, classical and quantum noise in semiconductor light emission. Set-up a key experiment showing the first evidence of stimulated scattering of massive bosons in the solid-state.
1994-1996 Post-doctoral fellow in Ecole Polytechnique Federale de Lausanne: semiconductor optics, two-component quantum fluids in low-dimensional semiconductors at ultra-low temperatures. Key work in the field first showing existence of a non-equilibrium bottleneck in the dynamics of the quantum fluids. Work on the light emission of correlated electron-hole gas. Supervised Ph.D. work of 1 student.
1992-1993: Visiting scientist at the Romand Institute of Numerical Research in Material Physics (IRRMA), Ecole Polytechnique Federale Lausanne (EPFL): molecular dynamics and electronic structure calculations, key work on physically-based optimization of the Car-Parinello ab-initio molecular dynamics method, later included in all standard codes.
1990: Collaborator, Italian National Institute of the Physics of Matter (I.N.F.M.): transport in semiconductors, resonant tunneling diodes.
Ph. D., Scuola Normale Superiore, Pisa, Italy, 30-june-1994, 70/70 cum laude, semiconductor optics and low-dimensional systems.
Diploma, Scuola Normale Superiore, Pisa, Italy, 21-may-1990.
Master in Physics, University of Pisa, Italy, 28-feb-1990, 110/110 cum laude. Semiconductor physics, transport in solids.
Green chemistry approach for optoelectronic device applications based on hybrid organic/inorganic materials:
We are currently exploring potential solutions to the color aging problems of OLEDs by shifting the burden of the emission of white light from different organic materials to robust inorganic materials, while keeping the advantages of cheap and scalable wet processing. Nanoparticles-based LED have been demonstrated by Samsung. The devices work by injecting charges in the nanoparticles (NPs). This is inefficient and requires to separately evaporate an organic hole-transporting layer. As a result, the device efficiency is low, comparable to incandescent light. Moreover, toxic Cd based NP have been used. Instead, we avoid charge injection into the NPs by using a single blue-light emitting polymer, directly exciting NPs through energy transfer, and we also use non-toxic NPs successfully synthesized in the Nanochemistry Labs, which are also optimal for the energy transfer process. We are also actively working on improving the energy transfer and device processability by functionalizating the NPs in solution, prior to deposition.
In another approach, we are developing fluorescent nanocomposites where the non-toxic NPs are embedded in a PMMA solid matrix. These materials may be used in conjunction to blue-emitting, GaN based LEDs to obtain white light emitters.
F. Tassone, G.L. Chiarotti, R. Rousseau, S. Scandolo, E. Tosatti “Dimerization of CO2 at high pressure and temperature” Chemphyschem. Vol 6, p 1752-6 (2005).
D. Donadio, M. Bernasconi, F. Tassone, "Photoelasticity of sodium silicate glass from first principles" Phys. Rev . Bvol 70, 214205-1 (2004).
F. D'Amore, S.M. Pietralunga, P. Lorusso, M. Martinelli, A. Zappettini, E.D. Bo, F. Tassone, P. Tognini, M. Travagnin, "Nonlinear optical characterisation of CdS and PbS quantum dots dispersed in a glass matrix" Phys. Status Solidi C, vol 4, 1001 (2004).
G. Dai, F. Tassone, A. Li Bassi, V. Russo, C.E. Bottani, and F. D' Amore, "TeO2-based glasses containing Nb2O5, TiO2 and WO3 for Discrete Raman Fiber Amplification," Photonics Technology Letters. vol. 16, 1011 (2004).
D. Donadio, M. Bernasconi and F. Tassone, "Photoelasticity of crystalline and amorphous silica from first principles", Phys. Rev. B. vol. 68, 134202(2003).
G. Weihs, H. Deng, R. Huang, M. Sugita, F. Tassone and Y. Yamamoto, " Exciton-polariton lasing in a microcavity", Sem. Science and Technology, vol. 18, S386 (2003).
C. Piermarocchi and F. Tassone, "Role of bound pairs in the optical properties of highly excited semiconductors: A self-consistent ladder approximation approach", Phys. Rev. B vol. 63, 245308 (2001).
F. Tassone and Y. Yamamoto, "Lasing and squeezing of composite bosons in semiconductor microcavity posts.", Phys. Rev. A vol. 62, 063809 (2000)
G. Klimovitch, F. Tassone, Y. Yamamoto, and H. Cao, "Stimulated resonant tunneling into quantum well excitons.", Phys. Lett. A. vol 267, 281 (2000).
R. Huang, F. Tassone, and Y. Yamamoto, "Experimental Evidence for stimulated scattering of excitons into polaritons in a semiconductor microcavity.", Phys. Rev. B, vol. 61, R7854, (2000).
F. Tassone and Y. Yamamoto, "Exciton-Exciton Scattering dynamics in a Semiconductor Microcavity and Stimulated Scattering into Polaritons", Phys. Rev. B, vol. 59, p. 10830-10842, (1999).
F. Tassone and C. Piermarocchi, "Electron-hole correlation effects in the emission of light from quantum wires", Phys. Rev. Lett., vol. 82, p. 843-846, (1999).
C. Piermarocchi, V. Savona, A. Quattropani, P.E. Selbmann, P. Schwendimann, F. Tassone, "Photoluminescence spectra in semiconductor confined systems: effects of Coulomb correlation" Phys. Status Solidi B, vol.206, no.1, p. 455-62, (1999).
J. Wainstain, G. Cassabois, Ph. Roussignol, C. Delalande, M. Voos, F. Tassone, R. Houdre, R. P. Stanley, U. Oesterle, "Relaxation of microcavity polariton",Superlattices and Microstructures, vol.22, no.3, p. 389-92, (1997).
C. Piermarocchi, V. Savona, A. Quattropani, P. Schwendimann, F. Tassone, "Role of carrier-phonon interaction on the exciton formation in quantum wells" , Phys. Status Solidi B, vol.204, no.1, p. 191-4, (1997).
G.F. Lorusso, F. Tassone, V. Capozzi, D. Martin, J.L. Staehli, "Anderson and Stark localization in GaAs/(AlGa)As disordered superlattices", Superlattices and Microstructures, vol.23, no.1, p. 9-12 (1998).
C. Piermarocchi, V. Savona, A. Quattropani, P. Schwendimann, F. Tassone, "Photoluminescence and carrier dynamics in GaAs quantum wells", Phys. Status Solidi A, vol.164, no.1, p. 221-5 (1997).
F. Tassone, C. Piermarocchi, V. Savona, A. Quattropani, P. Schwendimann, "Bottleneck effects in the relaxation and photoluminescence of microcavity polaritons", Phys. Rev. B, vol. 56, pag. 5774 (1997).
V. Savona, C. Piermarocchi, A. Quattropani, F. Tassone, P. Schwendimann, "Microscopic theory of motional narrowing of microcavity polaritons in a disordered potential", Phys. Rev. Lett., vol. 78, pag. 4470, (1997).
G. Bongiovanni, A. Mura, F. Quochi, S. Gurtler, J. L. Staehli, F. Tassone, R. Stanley, U. Oesterle, R. Houdre, "Coherent exciton-photon dynamics in semiconductor microcavities: the influence of inhomogeneous broadening", Phys. Rev. B, vol. 55, pag. 7084, (1997).
S. Pau, G. Bjork, H. Cao, F. Tassone, R. Huang, Y. Yamamoto, "LO-phonon-enhanced microcavity polariton emission", Phys. Rev. B, vol. 55, pag. R1942, (1997).
C. Piermarocchi, F. Tassone, V. Savona, A. Quattropani, P. Schwendimann, "Exciton formation rates in GaAs-AlxGa1-xAs quantum wells", Phys. Rev. B, vol. 55, pag. 1333, (1997).
F. Tassone, C. Piermarocchi, V. Savona, A. Quattropani, P. Schwendimann, in "Microcavity and Photonics Bandgaps", pages 87-94, 1996, edited by J. Rarity and C. Weisbuch, Kluwer Academic Publishers, Netherland.
A. Quattropani, V. Savona, F. Tassone, and P. Schwendimann, in "Quantum Optics of Confined Systems", proceedings of the 1995 Les Houches School of Physics, eds. M. Ducloy and D. Bloch, Kluwer Academic, (1996).
G. F. Lorusso, F. Tassone, V. Capozzi, J. L. Staehli, D. Martin, "Anderson and Stark localization in superlattices: residual coupling and fine structure", Solid State Comm., vol. 100, pag. 17 (1996).
G. F. Lorusso, F. Tassone, V. Capozzi, C. Perna, D. Martin, "Reflectance of GaAs/(AlGa)As disordered superlattices", Solid State Comm., vol. 98, pag. 705, (1996).
F. Tassone, C. Piermarocchi, V. Savona, A. Quattropani, P. Schwendimann, "Photoluminescence decay times in strong-coupling semiconductor microcavities", Phys. Rev. B, vol. 53, R7642, (1996).
C. Piermarocchi, F. Tassone, V. Savona, A. Quattropani, P. Schwendimann, "Nonequilibrium dynamics of free quantum-well excitons in time-resolved photoluminescence", Phys. Rev. .B, vol. 53, pag. 15834, (1996).
V. Savona, F. Tassone, C. Piermarocchi, A. Quattropani, P. Schwendimann, "Theory of polariton photoluminescence in arbitrary semiconductor microcavity structures", Phys. Rev. B, vol. 53, 13051 (1996).
F. Tassone, F. Bassani, "Quantum grating reflectivity and grating polariton lifetimes", Nuovo Cimento D, vol.17D, ser.1, p. 1743 (1995).
V. Savona, F. Tassone, "Exact quantum calculation of polariton dispersion in semiconductor microcavities", Solid State Comm., vol. 95, pag. 673, (1995).
F. Tassone, F. Bassani, "Reflectivity of the quantum grating and the grating polariton", Phys. Rev. B, vol. 51, pag. 16973, (1995).
F. Tassone, F. Mauri, R. Car, "Acceleration schemes for ab initio molecular-dynamics simulations and electronic-structure calculations", Phys. Rev. B, vol. 50, pag. 10561, (1994).
F. Bassani, F. Tassone, L. C. Andreani, Corso CXVII of the italian physical society, bologna, italy, (1993).
L. C. Andreani, F. Bassani, F. Tassone, International Conference Series, "Optics of Excitons in Confined Systems", ed. A. D'Andrea, R. Del Sole, R. Girlanda, A. Quattropani, vol. 123, pag 25, (1992).
S. Scandolo, F. Tassone, "Optical bistability induced by charge separation in asymmetric quantum wells", Physica Status Solidi B, vol. 173, pag. 453, (1992).
F. Tassone, F. Bassani, "Quantum wire polaritons", Nuovo Cimento D, vol. 14, pag. 1241, (1992).
L. C. Andreani, F. Tassone, F. Bassani, "Radiative lifetime of free excitons in quantum wells" Solid State Comm., vol. 77, pag. 641, (1991).
F. Tassone, F. Bassani, L. C. Andreani, "Quantum-well reflectivity and exciton-polariton dispersion", Phys. Rev. B, vol. 45, pag. 6023, (1992).
F. Tassone, F. Bassani, L. C. Andreani, "Resonant and surface polaritons in quantum wells", Nuovo Cimento D, vol. 12, pag. 1673, (1990).
BOOKS: Yoshihisa Yamamoto - F. Tassone - H. Cao, 'Semiconductor Cavity Quantum Electrodynamics', Springer Tracts in Modern Physics v. 169, pub. year 2000.