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Graphene Plasmonics

Speaker: 
Marco Polini (NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, Italy)
Date: 
Wed, 06/11/2013 - 11:00am to 12:00pm
Location: 
S13-M01-11 (Physics Conference Room)
Host: 
Shaffique Adam
Event Type: 
Seminars
In this talk I will review recent progress in the rapidly evolving field of `graphene plasmonics' [1].  In particular, I will focus on the fundamental properties of Dirac plasmons [2,3] in a doped graphene sheet, highlighting the subtle differences with plasmons in ordinary metals and parabolic-band two-dimensional electron liquids. I will then discuss two factors limiting the plasmon lifetime in single-layer graphene, namely electron-impurity scattering [4] and electron-electron collisions beyond the random phase approximation [5]. Finally, I will briefly advertise on-going experimental work in Pisa [6] related to the use of Dirac plasmons for efficient detection of Terahertz radiation in single-layer and bilayer graphene field-effect transistors.
 
References:
[1] A.N. Grigorenko, M. Polini, and K.S. Novoselov, Nature Photon. 6, 749 (2012)
[2] S.H. Abedinpour et al., Phys. Rev. B 84, 045429 (2011)
[3] M. Orlita et al., New J. Phys. 14, 095008 (2012)
[4] A. Principi et al., Phys. Rev. B 88, 121405(R) (2013)
[5] A. Principi et al., arXiv:1305.4666 (2013).
[6] L. Vicarelli et al., Nature Mater. 11, 865 (2012)

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