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Ultrahigh frequency transport and terahertz plasmonics in nanoscale structures, metamaterials, and 2D materials I

11:00 Keynote talk : Transparent Conducting Oxides and Hard Plasmonic Ceramics for Next-Generation Nanophotonics

J. Kim, N. Kinsey, A. Dutta, M. Ferrera, C. DeVault, I. Kitamura, A. V. Kildishev, V. M. Shalaev, A. Boltasseva

Purdue University (USA)

Our research focuses on transparent conducting oxides (TCOs) and transition metal nitrides (TMNs) which have great potential for enabling high performance, tunable, semiconductor compatible nanophotonic devices. Different types of applications have been studied to demonstrate the capability of TCOs and TMNs as plasmonic components, including unique properties in the epsilon near zero (ENZ) regime. For TCOs, tunability in both the intrinsic properties through deposition and annealing, as well as dynamic properties through optical excitation are explored.
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11:30 Invited talk : Transmission line theory of plasmonic crystal in the 2D electron systems: band spectrum and Tamm states

Gregory Aizin

Kingsborough College of the City University of New York (USA)

A transmission line theory of the 1D plasma excitations in periodically modulated 2D electron systems is presented. The theory is used to demonstrate formation of the plasmonic crystals in the 2D electron systems with periodic changes of electron density, gate screening or both. Analytical expressions for the plasmonic energy band spectrum are derived for both infinite and finite size crystals. Formation of the plasmonic Tamm states near the crystal edges is predicted.
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11:50 Invited talk : Engineering materials and fields for active Si-based metamaterials

Luca Dal Negro

Boston University (USA)

I will present results on the engineering of light emission and optical nonlinearity in transparent conductive oxides and nitrides (TCONs) for Si-compatible active metamaterials. In the near-infrared, TCNOs support plasmonic resonances with sub-wavelength field confinement and largely reduced losses. Moreover, their optical dispersion properties can be tuned in the telecom spectral range enabling efficient epsilon-near-zero (ENZ) media without the need of specialized nanofabrication. Applications to nonlinear frequency generation and light emitting hyperbolic metamaterials on Si will be presented.
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12:10 Invited talk : Terahertz radiation induced ratchet and plasmonic effects in two-dimensional systems with a lateral periodic potential

Peter Olbrich, Sergey Ganichev

University of Regensburg (Germany)

Experimental and theoretical work on ratchet and plasmonic effects in various 2D systems with asymmetric lateral superlattice excited by alternating terahertz radiation electric fields is reviewed. We consider the Seebeck ratchet effect and helicity driven photocurrents and show that their generation is based on the combined action of the spatially periodic in-plane potential and modulated light. We also discuss a dramatically enhancement in the vicinity of plasmonic resonances and address the potential for highly sensitive detection of terahertz radiation.
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12:30 Invited talk : Emission and Detection of Terahertz Radiation Using Two-Dimensional Plasmonic Metamaterials

Taiichi Otsuji (1),Akira Satou (1),S. A. Boubanga Tombet (1),Victor Ryzhii (1),Vyacheslav V. Popov (2),Vladimir Mitin (3),Michael S. Shur (4)

(1)Tohoku University (Japan) , (2)Kotelnikov Inst. of Radio Eng. and Electron. (Russia) , (3)University at Buffalo-SUNY (USA) , (4)Rensselaer Polytechnic Institute (USA)

This paper reviews the recent advances in emission and detection of terahertz (THz) radiation using two-dimensional (2D) plasmonic metamaterials. First, we present the 2D plasmonic meta-surface in a semiconductor quantum well structure implemented using an asymmetric dual-grating gate (A-DGG) InP-based high electron mobility transistor (HEMT). Second, we discuss the 2D plasmonic meta-surface in graphene featured by the A-DGG structure. Third, we present the concept of the plasmonic coupling between the SPPs and photon-assisted resonant tunneling in a double-graphene-layered meta-surfaces.
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