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Phase spectroscopy of topological invariants in photonic crystals

We propose a method of measuring topological invariants of a photonic crystal through phase spectroscopy. We show how the Chern numbers can be deduced from the winding numbers of the reflection coefficient phase. An explicit proof of existence of edge states in system with nonzero reflection phase winding number is given. The method is illustrated for one- and two-dimensional photonic crystals of nontrivial topology.

preprint2015arXivOpen access
A. V. PoshakinskiyA. N. PoddubnyM. Hafezi
cond-mat.mes-hallphysics.opticsquant-ph
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A. V. PoshakinskiyA. N. PoddubnyM. Hafezi

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