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Topological photonics in synthetic electromagnetic media I

14:00 Invited talk : Novel Topological States in Photonics

Marin Soljacic

MIT (USA)

Certain novel, topologically non-trivial, photonic states will be presented. Their properties and potential applications will be discussed.
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14:20 Invited talk : Waveguide-network-based realization of effective magnetic field for photons

Qian Lin, Shanhui Fan

Stanford University (USA)

We propose to create an effective magnetic field for photons in a two-dimensional waveguide network with strong scattering at waveguide junctions. The effective magnetic field is realized by a directional phase on waveguide links, which can be produced by dynamic modulation or magneto-optical effect. Compared to previous proposals, this scheme is resonator-free, thus greatly reduce the experimental complexity.
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14:40 Keynote talk : Photonic Topological Insulators and Topological Anderson Insulators

M. Segev (1),M. C. Rechtsman (2),S. Stutzer (3),Y. Plotnik (1),Y. Lumer (1),M. A. Bandres (4),J. M. Zeuner (5),Alexander Szameit (3)

(1)Technion (Israel) , (2)The Pennsylvania State University (USA) , (3)Friedrich Schiller Universitat Jena (Germany) , (4)Technion (Israel) , (5)Friedrich-Schiller Universitat (Germany)

The Topological Anderson Insulator is a state of matter that enters a topological phase upon the addition of disorder. Here, we show the theoretical proposal for and experimental demonstration of this effect in a two-dimensional photonic system, this effect has not been realized in the solid state- indeed, this is the first realization thereof in any system.
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15:10 Invited talk : Topologically protected elastic waves in phononic metamaterials

Hossein Mousavi (1),Alexander Khanikaev (2),Zheng Wang (1)

(1)University of Texas at Austin (USA) , (2)Queens College of The City University of New York (USA)

In this work we demonstrate that judicious engineering of solid structures can give rise to unusual topological systems supporting disorder-immune helical edge states for phonons. This approach opens up possibilities to realize novel topological phononic materials in both static and time-dependent regimes.
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15:30 Invited talk : Measuring topological invariants in photonic system

S. Mittal, S. Ganeshan, A. Vaezi, Mohammad Hafezi

Joint Quantum Institute (USA)

Electronic transport is localized in low-dimensional disordered media. The addition of gauge fields to disordered media leads to fundamental changes in the transport properties. We implement a synthetic gauge field for photons using silicon-on-insulator technology. We measure corresponding topological invariants and investigate the chiral gauge anomaly in the context of Chern-Simon theory. Our system provides a new platform for investigating the transport properties of photons in the presence of synthetic gauge fields.
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15:50 Invited talk : Quantum spin Hall effect and topological insulators for light

Konstantin Bliokh, Franco Nori

CEMS - RIKEN (Japan)

Free-space light has intrinsic quantum spin-Hall effect (QSHE) properties. These are characterized by a non-zero spin Chern number, and manifest themselves as evanescent modes of Maxwell equations. The recently-discovered transverse spin of evanescent modes demonstrates strong spin-momentum locking. As a result, any interface between vacuum and a medium supporting surface modes exhibits QSHE of light with opposite transverse spins propagating in opposite directions. Usual metals with surface-plasmon-polariton modes represent natural 3D topological insulators for light.
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