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Nonlinear and Reconfigurable Plasmonics and Metamaterials II

14:00 Invited talk : Integrated impedance-matched photonic Dirac-cone metamaterials

Yang Li, Shota Kita, Philip Munoz, Orad Reshef, Daryl I. Vulis, Marko Loncar, Eric Mazur

Harvard University (USA)

We design and fabricate an on-chip Dirac-cone metamaterial with impedance-matched zero index in optical regime. Our metamaterial consists of low-aspect-ratio silicon pillar arrays in an SU-8 matrix clad above and below by gold thin films. This design can serve as an on-chip platform to implement applications of Dirac-cone metamaterials in integrated photonics.
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14:20 Invited talk : Integrated super-couplers based on zero-index metamaterials

Daryl Vulis, Orad Reshef, Philip Munoz, Shota Kita, Yang Li, Marko Loncar, Eric Mazur

Harvard University (USA)

Zero-refractive-index metamaterials have been proposed as candidates for super-coupling applications, where light is confined to sub-diffraction limited length scales on-chip. Such a device allows for efficient coupling between disparate modes and compact 90 degree bends, which are challenging to achieve using dielectric waveguides. We discuss the simulation and fabrication results of all-dielectric on-chip zero-index metamaterial-based couplers. We observe transmission normal to all faces, regardless of the structure's shape, highlighting an unexplored feature of zero index metamaterials for integrated photonics.
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14:40 : Tunable Transmission with Hybrid Graphene/All-Dielectric Metamaterials

Christos Argyropoulos

University of Nebraska-Lincoln (USA)

Periodically arranged pairs of asymmetric silicon nanobars can sustain trapped magnetic resonances with a sharp Fano-type transmission or reflection signature. In this work, we theoretically present a hybrid graphene/all-dielectric metamaterial device constituted by periodic silicon nanobars placed over a silica substrate. One-atom-thick graphene monolayer is sandwiched between the dielectric nanobars and substrate. Tunable transmission is obtained at near-infrared (near-IR) wavelengths as the doping level of graphene is increased.
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