title: Edge States and Topological Phase Transitions in Chains of Dielectric Nanoparticles.
abstract: Recently introduced field of topological photonics aims to explore the concepts of topological insulators for novel phenomena in optics. Here polymeric chains of subwavelength silicon nanodisks are studied and it is demonstrated that these chains can support two types of topological edge modes based on magnetic and electric Mie resonances, and their topological properties are fully dictated by the spatial arrangement of the nanoparticles in the chain. It is observed experimentally and described how theoretically topological phase transitions at the nanoscale define a change from trivial to nontrivial topological states when the edge mode is excited.
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Sergey
authors.initials: S
authors.lastname: Kruk
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.|The Metamaterials Laboratory, ITMO University, St. Petersburg, 197101, Russia.
authors.forename: Alexey
authors.initials: A
authors.lastname: Slobozhanyuk
authors.affiliation: Center for Nanoscale BioPhotonics, Macquarie University, Sydney, NSW 2109, Australia.
authors.forename: Denitza
authors.initials: D
authors.lastname: Denkova
authors.affiliation: The Metamaterials Laboratory, ITMO University, St. Petersburg, 197101, Russia.|Ioffe Institute, St. Petersburg, 194021, Russia.
authors.forename: Alexander
authors.initials: A
authors.lastname: Poddubny
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
authors.forename: Ivan
authors.initials: I
authors.lastname: Kravchenko
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Andrey
authors.initials: A
authors.lastname: Miroshnichenko
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Dragomir
authors.initials: D
authors.lastname: Neshev
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Kivshar
keywords: edge states; nanofabrication; nanophotonics; near-field microscopy; topological photonics