Topological Hybrid Silicon Microlasers

Abstract

Topological photonics provides a robust framework for strategically controlling light confinement and propagation dynamics. By exploiting the marriage between this notion and symmetry-constrained mode competition in an active setting, we experimentally demonstrate, for the first time, a hybrid silicon microlaser structure supporting a topologically protected zero-mode lasing. This mode is distributed over an integrated array of optical microrings, each supporting multiple modes that compete for gain. However, the mode competition is diminished in favor of a pre-defined topological state, which reflects the charge conjugation symmetry induced by the gain profile. Robust single-mode operation in the desired state prevails even with intentionally introduced perturbations. The demonstrated microlaser is hybrid-implemented on a silicon-on-insulator substrate, thereby readily suitable for integrated silicon photonics with potential applications in optical communication and computing.

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References in corpus (10)

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• Selective enhancement of topologically induced interface states in a dielectric resonator chain
• Reversing the Pump-Dependence of a Laser at an Exceptional Point
• Topological Transition in a Non-Hermitian Quantum Walk
• Topologically Robust Transport of Photons in a Synthetic Gauge Field
• Topological Pumping over a Photonic Fibonacci Quasicrystal
• Non-Hermitian gauged topological laser arrays

Cited by in corpus (200)

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• A perspective on topological nanophotonics: current status and future challenges
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