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Wednesday, August 13 • 10:20 - 12:20
Carbon: Nanotubes & Graphene II

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10:20-10:35
Oral: Meydi Ferrier
Crossover Between SU(2) & SU(4) Kondo Effects in a Carbon Nanotube Probed by Shot-Noise

Co-authors: Tomonori Arakawa, Rio Fujiwara, Tokuro Hata, Kensuke Kobayashi, Richard Deblock, Raphaelle Delagrange, Helene Bouchiat, Rui Sakano, Akira Oguri

10:35-10:50
Oral: Duk-Hyun Choe
The Universal Conductance Fluctuation in the presence of Spin-Orbit Interactions in Graphene

Co-authors: Kee Joo Chang

10:50-11:05
Oral: Rohit Hegde
The Negative Energy Sea & the N=0 Quantum Hall Effect in Bilayer Graphene

Co-authors: Inti Sodemann, Fengcheng Wu, Allan MacDonald

11:05-11:20
Oral:
Anastasia Varlet
Tunable Fermi surface topology in gapped bilayer graphene

Co-authors: Dominik Bischoff, Pauline Simonet, Thomas Ihn, Klaus Ensslin, Marcin Mucha-Kruczynski, Vladimir Fal’ko, Kenji Watanabe, Takashi Taniguchi

11:20-11:50
Invited: Alexey Belyanin
Efficient Nonlinear Generation of Surface Plasmons in Graphene & Topological Insulators

Two-dimensional materials with massless Dirac electrons such as graphene and topological insulators support surface plasmon modes with a number of peculiar properties making them an attractive alternative to metal plasmonics. Here we show that a coherent surface plasmon mode guided by graphene or a topological insulator surface can be excited with high efficiency through the second-order nonlinear process of difference frequency generation (DFG). Although graphene is an isotropic medium for low-energy electron excitations, the second-order nonlinear susceptibility becomes non-zero when its spatial dispersion is taken into account. In this case the anisotropy is induced by the in-plane wave vectors of obliquely incident or in-plane propagating electromagnetic waves. The dispersion curves of surface plasmons strongly deviate from the photon dispersion already at THz frequencies, leading to a tight vertical confinement and large in-plane wave vector which can be matched to the sum of the photon wave vectors at mid- or even near-IR frequencies. This enables phase-matched DFG of THz plasmons with counter-propagating pump fields. The DFG process can reach efficiencies of 0.01/W and is broadly tunable by gating or varying an angle of incidence.

X. Yao et al. Phys. Rev. Lett. 112, 055501 (2014).

Co-authors: Xianghan Yao, Mikhail Tokman

11:50-12:05
Oral: Artsem Shylau
Plasmon-Mediated Coulomb Drag Between Graphene Waveguides

Co-authors: N/A

12:05-12:20
Oral: Yuki Koseki
Damping Mechanism of Terahertz Plasmons in Graphene on Heavily-Doped Substrate

Co-authors: Akira Satou, Victor Ryzhii, Vladimir Vyurkov, Taiichi Otsuji 

Session Chairs
RC

Rodrigo Capaz

Universidade Federal do Rio de Janeiro

Speakers
AB

Alexey Belyanin

Professor, Department of Physics & Astronomy, Texas A&M University


Wednesday August 13, 2014 10:20 - 12:20
Room 17B

Attendees (12)