Surface plasmon polaritons (SPPs) are hybrid modes of light and electrons on conducting surfaces. Analogous to Bloch electrons in crystals, SPPs traveling in a medium with spatially varied properties experience scattering and interference, which transforms SPPs into Bloch polaritons. Bloch polaritons possess the universal attributes of Bloch quasiparticles whose energy-momentum dispersion is dictated by the underlying band structure. It is therefore feasible to reconstruct the polariton bands structure by exploring the real space motion of ballistic Bloch wavepackets. We visualized the band structure of Bloch polaritons in a graphene-based polariton crystal by utilizing near-field imaging techniques to record the propagation of Bloch polaritons launched by nano-structured antennas. Bloch polaritons emanating from a point antenna reveal star-shaped patterns which encode information for the underlying polariton band structure. Fourier analysis of the near-field images reveals the isofrequency contours of the polariton bands which can subsequently be stacked to form a complete band structure. As the energy bands in graphene polariton crystals are tunable by gate voltage, we were able to switch on demand the propagation direction of Bloch polaritons and make a polariton switch.
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Presenters
Yutao Li
Columbia Univ
Columbia University
Authors
Yutao Li
Columbia Univ
Columbia University
Lin Xiong
Department of Physics, Columbia University
Columbia Univ
Columbia University
Minwoo Jung
Cornell University
Carlos Forsythe
Columbia Univ
Columbia University
Shuai Zhang
Department of Physics, Columbia University
Columbia Univ
Columbia University
Alexander S McLeod
Columbia University
Department of Physics, Columbia University
Columbia Univ
Yinan Dong
Columbia Univ
Columbia University
Song Liu
Kansas State University
Kenji Watanabe
National Institute for Materials Science
National Institute for Materials Science, Japan
National Institure for Materials Science
Advanced Materials Laboratory, National Institute for Materials Science
NIMS
National Institute of Materials Science
National Institute for Materials Science (NIMS)
Research Center for Functional Materials, National Institute for Materials Science
National Institute for Materials Science,1-1 Namiki
National Institute of Material Science
National Institute for Materials Science, Tsukuba, Japan
Research Center for Functional Materials, NIMS
National Institute of Materials Science, Tsukuba, Japan
National Institude for Materials Science
National Institute for Materials Science, Tsukuba, Ibaraki, Japan
Research Center for Functional Materials, National Institute for Materials Science, Tsukuba 305-0044, Japan
International Center for Materials Nanoarchitectonics, National Institute for Materials
NIMS - Japan
National Institute for Materials Science ,Japan
National Institute for Materials Science, Tsukuba, 305-0044, Ibaraki, Japan
National Institute for Material Science
National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan
National Institute for Material Science Japan
NIMS Tsukuba
National Institute for Materials Science, Research Center for Functional Materials, Japan
Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
National Institute for Materials Science: Namiki, Tsukuba, Ibaraki, JP
National Institue for Material Science
National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan
Materials, NIMS
Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, Research Center for Functional Materials, National In
Research Center for Functional Materials, Japan
International Center for Materials Nanoarchitectonics, National Institute for Materials Science
International Center for Materials nanoarchtectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
NIMS Suguba
NIMS, Tsukuba, Japan
National Institute for Materials Science, Namiki 1-1, Tsukuba, 305-0044, Ibaraki, Japan
National institute of material science
Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
Advanced Materials Laboratory, NIMS
Research Center for Functional Materials, National Institute for Materials Science, Ibaraki, Japan
National Institute for Materials Science, Research Center for Functional Materials
National Institute of Material Science, Japan
Tsukuba, National Institute for Materials Science
Takashi Taniguchi
National Institute for Materials Science
National Institute for Materials Science, Japan
National Institure for Materials Science
Advanced Materials Laboratory, National Institute for Materials Science
NIMS
National Institute of Materials Science
National Institute for Materials Science (NIMS)
International Center for Materials Nanoarchitectonics, National Institute for Materials Science
National Institute for Materials Science,1-1 Namiki
National Institute of Material Science
National Institute for Materials Science, Tsukuba, Japan
International Center for Materials Nanoarchitectonics, NIMS
Research Center for Functional Materials, National Institute for Materials Science
National Institute of Materials Science, Tsukuba, Japan
National Institude for Materials Science
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba 305-0044, Japan
International Center for Materials Nanoarchitectonics, National Institute for Materials
NIMS - Japan
National Institute for Materials Science ,Japan
National Institute for Materials Science, Tsukuba, 305-0044, Ibaraki, Japan
National Institute for Material Science
National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan
National Institute for Material Science Japan
8International Center for Materials Nanoarchitectonics
NIMS Tsukuba
National Institute for Materials Science: Namiki, Tsukuba, Ibaraki, JP
National Institue for Material Science
National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan
Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, Research Center for Functional Materials, National In
Research Center for Functional Materials, Japan
Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
International Center for Material Nanoarchitectonics, National Institute for Materials Science
International Center for Materials Nanoarchitectonics
NIMS Suguba
NIMS, Tsukuba, Japan
National Cheng Kung University
National Institute for Materials Science, Namiki 1-1, Tsukuba, 305-0044, Ibaraki, Japan
National institute of material science
Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
Advanced Materials Laboratory, NIMS
National Institute for Materials Science, International Center for Materials Nanoarchitectonics
National Institute of Material Science, Japan
Tsukuba, National Institute for Materials Science
Michael Fogler
University of California, San Diego
Department of Physics, University of California San Diego
UC San Diego
Department of Physics, University of California, San Diego
UCSD
University of California San Diego
James Edgar
Chemical Engineering, Kansas State University
Kansas State University
Tim Taylor Department of Chemical Engineering, Kansas State University
