Topological hybrid silicon microlasers

Han Zhao, Pei Miao, Mohammad H. Teimourpour, Simon Malzard, Ramy El-Ganainy, Henning Schomerus and Liang Feng ()
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Han Zhao: University of Pennsylvania
Pei Miao: University of Pennsylvania
Mohammad H. Teimourpour: Michigan Technological University
Simon Malzard: Lancaster University
Ramy El-Ganainy: Michigan Technological University
Henning Schomerus: Lancaster University
Liang Feng: University of Pennsylvania

Nature Communications, 2018, vol. 9, issue 1, 1-6

Abstract: Abstract Topological physics provides a robust framework for strategically controlling wave confinement and propagation dynamics. However, current implementations have been restricted to the limited design parameter space defined by passive topological structures. Active systems provide a more general framework where different fundamental symmetry paradigms, such as those arising from non-Hermiticity and nonlinear interaction, can generate a new landscape for topological physics and its applications. Here, we bridge this gap and present an experimental investigation of an active topological photonic system, demonstrating a topological hybrid silicon microlaser array respecting the charge-conjugation symmetry. The created new symmetry features favour the lasing of a protected zero mode, where robust single-mode laser action in the desired state prevails even with intentionally introduced perturbations. The demonstrated microlaser is hybrid implemented on a silicon-on-insulator substrate, and is thereby readily suitable for integrated silicon photonics with applications in optical communication and computing.

Date: 2018
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DOI: 10.1038/s41467-018-03434-2

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