2026-10-14T12:54:44Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34033632 2026-09-30T16:00:53Z category_37476 portal_1023 item_type_12 month_year_09_2026

Multimode oscillation and its route to chaos in transverse-mode-coupled optomechanical resonators Motoki Asano (14414712) Lalit Maharjan (25144776) Hiroshi Yamaguchi (575651) Physics (arXiv) physics.optics (arXiv) cond-mat.mes-hall (arXiv) Nonlinear oscillators exhibit rich collective phenomena including synchronization, bifurcation, and chaos. Experimentally accessing multimode nonlinear dynamics, however, remains challenging because low-order internal resonances readily induce mode locking and suppress stable multimode oscillation. Here, we demonstrate a transverse-mode-coupled optomechanical platform that combines engineered collective mechanical modes with optically controllable nonlinear interactions. The engineered transverse mechanical modes enable stable two- and three-mode self-sustained oscillations while suppressing trivial low-order internal resonances. By varying the laser frequency, we observe successive beat-frequency fractionalization (Δf/2 and Δf/3), followed by a broadband state exhibiting enhanced trajectory divergence consistent with deterministic chaos. These results establish transverse-mode-coupled optomechanical resonators as a scalable and tunable platform for exploring high-dimensional nonlinear dynamics in interacting mechanical networks. 2026-09-28T00:00:00Z Text Preprint 10.48550/arXiv.2609.34040 https://figshare.com/articles/preprint/Multimode_oscillation_and_its_route_to_chaos_in_transverse-mode-coupled_optomechanical_resonators/34033632 CC0