S. Oh, B. Lang, D. Beggs, D. Huffaker, M. Saba, O. Hess
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Chiral Light-Matter Interaction in Dielectric Photonic Topological Insulators
A unidirectional chiral edge mode in photonic topological insulators can be selectively excited by a circularly-polarized dipole source. We show that the directionality is also determined by the position of the dipole source.