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Dynamic control of 2D non-Hermitian photonic corner states in synthetic dimensions by Zheng, Xinyuan; Mehrabad, Mahmoud Jalali; Vannucci, Jonathan; Li, Kevin; Dutt, Avik; Hafezi, Mohammad; Mittal, Sunil; Waks, Edo is a scholarly article available to read on EtoBox.

What is Dynamic control of 2D non-Hermitian photonic corner states in synthetic dimensions about?

Non-Hermitian models describe the physics of ubiquitous open systems with gain and loss. One intriguing aspect of non-Hermitian models is their inherent topology that can produce intriguing boundary phenomena like resilient higher-order topological insulators (HOTIs) and non-Hermitian skin effects (NHSE). Recently, time-multiplexed lattices in synthetic dimensions have emerged as a versatile platform for the investigation of these effects free of geometric restrictions. Despite holding broad applications, studies of these effects have been limited to static cases so far, and full dynamical control over the non-Hermitian effects has remained elusive. Here, we demonstrate the emergence of topological non-Hermitian corner states with remarkable temporal controllability and robustness in a two-dimensional photonic synthetic time lattice. Specifically, we showcase various dynamic control mechanisms for light confinement and flow, including spatial mode tapering, sequential non-Hermiticity on-off switching, dynamical corner state relocation, and light steering. Moreover, we establish the corner state's robustness in the presence of intensity modulation randomness and quantitatively deter

Author

Zheng, Xinyuan; Mehrabad, Mahmoud Jalali; Vannucci, Jonathan; Li, Kevin; Dutt, Avik; Hafezi, Mohammad; Mittal, Sunil; Waks, Edo

Published

2024

Language

EN