Nonlinear Control of Electromagnetic Topological Edge States.

Autor:	Dobrykh DA; ITMO University, St. Petersburg 197101, Russia., Yulin AV; ITMO University, St. Petersburg 197101, Russia., Slobozhanyuk AP; ITMO University, St. Petersburg 197101, Russia.; Nonlinear Physics Center, Australian National University, Canberra Australian Capital Territory 2601, Australia., Poddubny AN; ITMO University, St. Petersburg 197101, Russia.; Nonlinear Physics Center, Australian National University, Canberra Australian Capital Territory 2601, Australia.; Ioffe Physical-Technical Institute of the Russian Academy of Sciences, St. Petersburg 194021, Russia., Kivshar YS; ITMO University, St. Petersburg 197101, Russia.; Nonlinear Physics Center, Australian National University, Canberra Australian Capital Territory 2601, Australia.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2018 Oct 19; Vol. 121 (16), pp. 163901.
DOI:	10.1103/PhysRevLett.121.163901
Abstrakt:	Topological photonics has emerged recently as a smart approach for realizing robust optical circuitry, and the study of nonlinear effects is expected to open the door for tunability of photonic topological states. Here we realize experimentally nonlinearity-induced spectral tuning of electromagnetic topological edge states in arrays of coupled nonlinear resonators in the pump-probe regime. When nonlinearity is weak, we observe that the frequencies of the resonators exhibit spectral shifts concentrated mainly at the edge mode and affecting only weakly the bulk modes. For a strong pumping, we describe several scenarios of the transformation of the edge states and their hybridization with bulk modes, and also predict a parametrically driven transition from topological stationary to unstable dynamic regimes.
Databáze:	MEDLINE
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