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Journal articleSun Z, Hasan T, Torrisi F, et al., 2010,
Graphene mode-locked ultrafast laser.
, ACS Nano, Vol: 4, Pages: 803-810, ISSN: 1936-086XGraphene is at the center of a significant research effort. Near-ballistic transport at room temperature and high mobility make it a potential material for nanoelectronics. Its electronic and mechanical properties are also ideal for micro- and nanomechanical systems, thin-film transistors, and transparent and conductive composites and electrodes. Here we exploit the optoelectronic properties of graphene to realize an ultrafast laser. A graphene-polymer composite is fabricated using wet-chemistry techniques. Pauli blocking following intense illumination results in saturable absorption, independent of wavelength. This is used to passively mode-lock an erbium-doped fiber laser working at 1559 nm, with a 5.24 nm spectral bandwidth and approximately 460 fs pulse duration, paving the way to graphene-based photonics.
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Conference paperPopa D, Sun Z, Torrisi F, et al., 2010,
Generation of 63-nJ pulses from a fiber oscillator mode-locked by nanotubes
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Conference paperSun Z, Hasan T, Popa D, et al., 2010,
Ultrafast Fiber Laser Mode-locked by Graphene Based Saturable Absorber
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Conference paperWang F, Popa D, Sun Z, et al., 2010,
Characterization of Dynamic Nonlinear Absorption of Carbon Nanotube Saturable Absorber
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Journal articleLa Fata P, Torrisi F, Lombardo S, et al., 2009,
Amorphous to fcc-polycrystal transition in Ge2Sb2Te5 thin films studied by electrical measurements: Data analysis and comparison with direct microscopy observations
, JOURNAL OF APPLIED PHYSICS, Vol: 105, ISSN: 0021-8979 -
Journal articleLa Fata P, Puglisi R, Lombardo S, et al., 2008,
Nano-patterning with Block Copolymers
, SUPERLATTICES AND MICROSTRUCTURES, Vol: 44, Pages: 693-698, ISSN: 0749-6036- Author Web Link
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- Citations: 9
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Journal articleGeyer T, Torrisi FD, Morari M, 2008,
Optimal complexity reduction of polyhedral piecewise affine systems
, AUTOMATICA, Vol: 44, Pages: 1728-1740, ISSN: 0005-1098- Author Web Link
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- Citations: 77
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Journal articleSciacca E, Lombardo S, Mazzillo M, et al., 2006,
Arrays of geiger mode avalanche photodiodes
, IEEE Photonics Technology Letters, Vol: 18, Pages: 1633-1635, ISSN: 1041-1135Following our previous work which has led us to fabricate single pixels of geiger mode avalanche photodiodes (GMAPs), we present in this letter the results regarding the fabrication and characterization of a bidimensional array of GMAPs. Low dark count rates and very good uniformity over the sensor are reported. High quantum efficiency in the visible range has been measured. Measurements indicate that not all the nominal active area is effectively sensitive. We have some preliminary evidence that no crosstalk effects are present in our device. Notwithstanding this, in view of a near future shrinking of all dead regions, an optical trench process has been developed and is illustrated here. Possible future trends are highlighted. © 2006 IEEE.
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Journal articlePotocnik B, Bemporad A, Torrisi FD, et al., 2004,
Hybrid modelling and optimal control of a Multiproduct Batch Plant
, CONTROL ENGINEERING PRACTICE, Vol: 12, Pages: 1127-1137, ISSN: 0967-0661- Author Web Link
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- Citations: 20
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Journal articleGrieder P, Borrelli F, Torrisi F, et al., 2004,
Computcation of the constrained infinite time linear quadratic regulator
, AUTOMATICA, Vol: 40, Pages: 701-708, ISSN: 0005-1098- Author Web Link
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- Citations: 85
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Journal articleTorrisi FD, Bemporad A, 2004,
HYSDEL - A tool for generating computational hybrid models for analysis and synthesis problems
, IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, Vol: 12, Pages: 235-249, ISSN: 1063-6536- Author Web Link
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- Citations: 286
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Journal articleBemporad A, Filippi C, Torrisi FD, 2004,
Inner and outer approximations of polytopes using boxes
, COMPUTATIONAL GEOMETRY-THEORY AND APPLICATIONS, Vol: 27, Pages: 151-178, ISSN: 0925-7721- Author Web Link
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- Citations: 36
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Conference paperGeyer T, Torrisi FD, Morari M, 2004,
Optimal complexity reduction of piecewise affine models based on hyperplane arrangements
, American Control Conference, Publisher: IEEE, Pages: 1190-1195, ISSN: 0743-1619- Author Web Link
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- Citations: 24
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Conference paperLiscidini A, Brandolini M, Rossi P, et al., 2004,
Design methodology of feedback-LNAs for GHz applications
, BIPOLAR/BiCMOS Circuits and Technology Meeting, Publisher: IEEE, Pages: 253-256, ISSN: 1088-9299 -
Conference paperBonfanti A, Levantino S, Pellerano S, et al., 2003,
A voltage-controlled oscillator for IEEE 802.11a and HiperLAN2 application
, 29th European Solid-State Circuits Conference, Publisher: IEEE, Pages: 695-698 -
Conference paperGrieder P, Borrelli F, Torrisi F, et al., 2003,
Computation of the constrained infinite time linear quadratic regulator
, Annual American Control Conference (ACC 2003), Publisher: IEEE, Pages: 4711-4716, ISSN: 0743-1619- Author Web Link
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- Citations: 8
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Conference paperGeyer T, Torrisi FD, Morari M, 2003,
Efficient mode enumeration of compositional hybrid systems
, 6th International Workshop on Hybrid Systems - Computation and Control (HSCC 2003), Publisher: SPRINGER-VERLAG BERLIN, Pages: 216-232, ISSN: 0302-9743- Author Web Link
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- Citations: 19
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Journal articleCosentino S, Filoramo P, Granata A, et al., 2002,
An integrated RF transceiver for DECT application
, IEEE JOURNAL OF SOLID-STATE CIRCUITS, Vol: 37, Pages: 443-449, ISSN: 0018-9200- Author Web Link
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- Citations: 2
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Journal articleBemporad A, Fukuda K, Torrisi FD, 2001,
Convexity recognition of the union of polyhedra
, COMPUTATIONAL GEOMETRY-THEORY AND APPLICATIONS, Vol: 18, Pages: 141-154, ISSN: 0925-7721- Author Web Link
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- Citations: 62
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Conference paperTorrisi FD, Bemporad A, 2001,
Discrete-time hybrid modeling and verification
, 40th IEEE Conference on Decision and Control, Publisher: IEEE, Pages: 2899-2904, ISSN: 0743-1546- Author Web Link
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- Citations: 14
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Contact
Dr Felice Torrisi
Senior Lecturer in Chemistry of Two-Dimensional Materials
401A
Molecular Sciences Research Hub
White City Campus
f.torrisi@imperial.ac.uk
+44 (0)20 7594 5818