Scientific Achievement
Topological edge states of light are demonstrated in zig-zag chains of dielectric nanoparticles.
Significance and Impact
In photonics, the edge states correspond to light localization at the interfaces between topologically different materials. These states form the basis of the design of topologically protected photonic circuitry immune to defects and backward scattering.
Research Details
– Zig-zag chains of dielectric nanoparticles on a transparent substrate behave as electric or magnetic dipole resonators coupled to their nearest neighbors.
– The existence of optical topological edge states of both electric and magnetic origin is revealed.
– Phase transitions between topologically trivial and nontrivial states are traced as a function of the bond angle between particles.
S. Kruk, A. Slobozhanyuk, D. Denkova, A. Poddubny, I. Kravchenko, A.Miroshnichenko, D. Neshev, and Yu. S. Kivshar. Small (2017). DOI: 10.1002/smll.201603190
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