Experimental demonstration of valley-Hall topological photonic crystal at telecommunication wavelengths

Photonic topological insulators provide unprecedented possibilities to eliminate scattering losses and improve the efficiency of optical communication systems. Despite significant theoretical efforts, the experimental demonstration of an integrated photonic topological insulator operating in the tel...

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Bibliographic Details
Published in:arXiv.org 2018-05
Main Authors: Shalaev, Mikhail I, Walasik, Wiktor, Tsukernik, Alexander, Xu, Yun, Litchinitser, Natalia M
Format: Article
Language:English
Subjects:
CMOS
Crystal structure
Hall effect
Optical communication
Photonic crystals
Topological insulators
Topology
Wavelengths
Online Access:Get full text
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Summary:Photonic topological insulators provide unprecedented possibilities to eliminate scattering losses and improve the efficiency of optical communication systems. Despite significant theoretical efforts, the experimental demonstration of an integrated photonic topological insulator operating in the telecommunication regime was still missing. Here, we design, fabricate and characterize a photonic-crystal-based topological structure that exhibits valley-Hall effect. We experimentally demonstrate the propagation of topologically protected edge states in a CMOS-compatible chip operating at telecommunication wavelengths. This contribution is an important step towards integrated topological photonics.
ISSN:2331-8422