Please post and forward to you groups, thanks!
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excitonics seminar series
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http://www.rle.mit.edu/excitonics/images/MarcoPolini.jpg]
Marco Polini
NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore di Pisa
Plasmonic Figures of Merit
in a Doped Graphene Sheet
Thursday, May 15, 2014
RLE Conference Room - 36-428
2:00 - 3:00 pm*
*note time change
Abstract:
"Dirac" plasmons are self-sustained density oscillations that occur in a doped
graphene sheet. These collective modes have recently attracted enormous experimental
interest for their potential use in plasmonic circuits. In this talk I will discuss the
two most important figures of merit of `graphene plasmonics', namely the ratio
between the Dirac plasmon wavelength and the illumination wavelength, and the Dirac
plasmon damping rate. More precisely, I will first discuss the fundamental properties of
the Dirac plasmon dispersion, highlighting the main differences with respect to plasmons
in ordinary two-dimensional parabolic-band electron liquids. I will then emphasize the
subtle difference between plasmon lifetime and Drude transport scattering time. Finally, I
will present a theoretical framework that allows to calculate in a fully microscopic
fashion Dirac plasmon damping rates due to electron-electron, electron-impurity, and
electron-phonon collisions.
Bio
Marco Polini received a Laurea degree in Physics from the University of Pisa in 1999 and a
Ph.D. in Physics from Scuola Normale Superiore, Pisa (Italy) in 2003. In 2003, he was a
Visiting Postdoctoral Researcher at the University of Texas at Austin with Prof. Allan H.
MacDonald's research group. He was a Visiting Professor at the Zhejiang Normal
University, China, with Prof. Xianlong Gao and his team in 2007-2008 and at the Texas
A&M University (College Station, Texas) in Prof. Jairo Sinova's group in 2012.
In 2010, Marco received a prize for "the best foreign researcher who has the largest
number of collaborations with Iranian counterparts" from the Iran Nanotechnology
Initiative Council (INIC). In that same year he was awarded the prestigious Italian
grant "FIRB - Futuro in Ricerca.<http://www.plasmograph.it/> " Currently
he is a Researcher and Assistant Professor at NEST, NEST, Istituto
Nanoscienze-CNR<http://www.nano.cnr.it> and Scuola Normale Superiore di
Pisa<http://www.sns.it/en/> since 2008. His field of research is in condensed
matter theory with more than 100 publications in peer-reviewed international journals
including Science, Nature Materials, Nature Nanotechnology, Nature Photonics, Nature
Communications, and Physical Review Letters.
Light refreshments will be served