Observation and control of nonlinear electromagnetic topological edge states

Autor:	Dobrykh, D. A., Yulin, A. V., Slobozhanyuk, A. P., Poddubny, A. N., Kivshar, Yu. S.
Rok vydání:	2018
Předmět:	Physics - Optics Condensed Matter - Mesoscale and Nanoscale Physics Physics - Classical Physics
Zdroj:	Phys. Rev. Lett. 121, 163901 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.121.163901
Popis:	Topological photonics has recently emerged as a route to realize robust optical circuitry, and nonlinear effects are expected to enable tunability of topological states with the light intensity. Here we realize experimentally nonlinear self-induced spectral tuning of the electromagnetic topological edge states in an array of coupled nonlinear resonators in a pump-probe experiment. In a weakly nonlinear regime, we observe that resonators frequencies exhibit spectral shifts, that are concentrated mainly at the edge mode 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 to unstable regimes. Comment: 5 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1805.03760 Zobrazit plný text záznamu View this record from Arxiv