Nonreciprocal and topological phenomena in active optomechanical meta-matter

Ewold Verhagen

doi:10.1117/12.3028495

3 October 2024 Nonreciprocal and topological phenomena in active optomechanical meta-matter

Ewold Verhagen

Proceedings Volume PC13110, Active Photonic Platforms (APP) 2024; PC1311016 (2024) https://doi.org/10.1117/12.3028495
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

We create multi-mode nano-optomechanical networks in which the interactions between mechanical modes are induced and fully reconfigured through time-modulated radiation pressure forces. We study the nonreciprocal and topological states that emerge from controlled breaking of time-reversal symmetry and Hermiticity in such laser-driven optomechanical metamaterials. We demonstrate unidirectional flow of sound and the emergence of the quantum Hall effect in small networks of nanomechanical resonators. We uncover that broken time-reversal symmetry can influence the thermodynamic efficiency of optomechanical refrigeration. Moreover, we realize the bosonic Kitaev chain; the bosonic counterpart of the fermionic model that famously predicts Majorana zero modes. This establishes a non-Hermitian topological phase in which a unique form of directional amplification emerges as a physical phenomenon that links to the chain’s topological nature. This behavior has intriguing implications for signal processing and enhanced sensing performance.

Conference Presentation

Citation Download Citation

Ewold Verhagen "Nonreciprocal and topological phenomena in active optomechanical meta-matter", Proc. SPIE PC13110, Active Photonic Platforms (APP) 2024, PC1311016 (3 October 2024); https://doi.org/10.1117/12.3028495

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