Physics – Condensed Matter – Materials Science
Scientific paper
2012-04-25
Physics
Condensed Matter
Materials Science
13 pages, 3 figures
Scientific paper
Recent progress in understanding the topological properties of condensed matter has led to the discovery of time-reversal invariant topological insulators. Because of limitations imposed by nature, topologically non-trivial electronic order seems to be uncommon except in small-band-gap semiconductors with strong spin-orbit interactions. In this Article we show that artificial electromagnetic structures, known as metamaterials, provide an attractive platform for designing photonic analogues of topological insulators. We demonstrate that a judicious choice of the metamaterial parameters can create photonic phases that support a pair of helical edge states, and that these edge states enable one-way photonic transport that is robust against disorder.
Kargarian Mehdi
Khanikaev Alexander B.
MacDonald Allan. H.
Mousavi Hossein S.
Shvets Gennady
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