%0 Journal Article %1 PhysRevB.103.085412 %A Schmidt, Christoph %A Palatnik, Alexander %A Sudzius, Markas %A Meister, Stefan %A Leo, Karl %D 2021 %I American Physical Society %J Phys. Rev. B %K a d %N 8 %P 085412 %R 10.1103/PhysRevB.103.085412 %T Coupled topological interface states %U https://link.aps.org/doi/10.1103/PhysRevB.103.085412 %V 103 %X Topological interface states in one-dimensional electronic and photonic systems are currently intensively investigated. We demonstrate the coupling of topologically confined states: By concatenation of three substructures, where the outer embedding structures have opposite signs of reflection phases to the embedded structure, we realize a system of coupled interface states showing mode splitting. We theoretically and experimentally show that a topological transition occurs for this coupled system. The demonstration of these systems is put on a solid foundation by first realizing the substructures relevant for interface states between topologically distinct one-dimensional photonic crystals. We experimentally demonstrate band closing and band inversion for a redistribution of the optical path to the constitutive materials of the structures. The band inversion is demonstrated by the emergence of interface states at metal-dielectric interfaces and the findings are supported by ellipsometric measurements.

@article{PhysRevB.103.085412, abstract = {Topological interface states in one-dimensional electronic and photonic systems are currently intensively investigated. We demonstrate the coupling of topologically confined states: By concatenation of three substructures, where the outer embedding structures have opposite signs of reflection phases to the embedded structure, we realize a system of coupled interface states showing mode splitting. We theoretically and experimentally show that a topological transition occurs for this coupled system. The demonstration of these systems is put on a solid foundation by first realizing the substructures relevant for interface states between topologically distinct one-dimensional photonic crystals. We experimentally demonstrate band closing and band inversion for a redistribution of the optical path to the constitutive materials of the structures. The band inversion is demonstrated by the emergence of interface states at metal-dielectric interfaces and the findings are supported by ellipsometric measurements.}, added-at = {2021-05-12T12:12:08.000+0200}, author = {Schmidt, Christoph and Palatnik, Alexander and Sudzius, Markas and Meister, Stefan and Leo, Karl}, biburl = {https://www.bibsonomy.org/bibtex/2f1e2f393a80529329c89fb68689bba25/ctqmat}, day = 08, description = {Phys. Rev. B 103, 085412 (2021) - Coupled topological interface states}, doi = {10.1103/PhysRevB.103.085412}, interhash = {f7c82446eecd70c43aa6d38b9acee025}, intrahash = {f1e2f393a80529329c89fb68689bba25}, journal = {Phys. Rev. B}, keywords = {a d}, month = {02}, number = 8, numpages = {8}, pages = 085412, publisher = {American Physical Society}, timestamp = {2023-01-16T14:49:29.000+0100}, title = {Coupled topological interface states}, url = {https://link.aps.org/doi/10.1103/PhysRevB.103.085412}, volume = 103, year = 2021 }