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Lorenzo Pavesi

Prof. Lorenzo  Pavesi

Director, Nanoscience Laboratory
University of Trento

Physics Department
University of Trento
via Sommarive 14
Povo - Trento  38123

tel: +390 461 281605
fax: +390 461 282967
E-mail: pavesi@science.unitn.it
Web: http://www.unitn.it/en/dphys/7421/nanoscience

Area of Expertise

Silicon photonics, nanotechnology


Lorenzo Pavesi is Professor of Experimental Physics at the University of Trento (Italy). Born the 21st of November 1961, he received his PhD in Physics in 1990 at the Ecole Polytechnique Federale of Lausanne (Switzerland). He leads the Nanoscience Laboratory (25 people). His research activity concerned the optical properties of semiconductors. During the last years, he concentrated on Silicon based photonics where he looks for the convergence between photonics and electronics by using silicon nanostructures. He is interested in active photonics devices which can be integrated in silicon by using classical waveguides or novel waveguides such as those based on dynamical photonic crystals. His interests encompass also optical sensors or biosensors and solar cells. He is an author or co-author of more than 280 papers, author of several reviews, editor of more than 10 books, author of 2 books and holds six patents. He holds an H-number of 41 according to the web of science.

Lecture Title(s)

NanoSilicon/NanoPhotonics:  Silicon Photonics is no more an emerging research topica but is an actual technology with commercial products already available on the market. Quantum confinement of carriers or spatial localization of photonics allow to dramatically enhance and widen the scope and potential of silicon photonics. After a review of silicon photonics where the state of the art is presented, the optical properties of silicon reduced to nanometric dimensions are introduced. The use of nano-Si in silicon photonics (waveguides, modulators, switches, sources and detectors) is reviewed and discussed. Recent advances of nano-Si devices such as bio-imagers, optical resonators (linear, rings, and disks) are treated. The development of high efficiency light emitting diodes for interchip bidirectional optical interconnects is presented as well as the recent progresses to exploit nano-Si for solar cells. In addition, non-linear optical effects which enable fast all-optical switches are described. On the other hand, confinement of photons to small microresonators allows tuning the photon properties. Here also novel effects are found. Ultra high bandwidth robust optical switches for UDWDM, active suspended microdisk bistable devices, nonlinear optical generations are only few applications where nanophotonics can be appreciated.

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