[15p-WL2_301-1~9] 3.7 Optical measurement, instrumentation, and sensor

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[15p-WL2_301-2] Optically induced cross–nonlinear damping between two mechanical modes

〇Hideki Arahari¹, Motoki Asano¹, Hiroshi Yamaguchi¹, Hajime Okamoto¹ (1.NTT Basic Res. Labs.)

Keywords:

Optomechanics,Nonlinear damping,Microbottle resonator

Nonlinear damping, in which dissipation depends on the vibration amplitude, plays an important role in the stabilization of MEMS sensors and in the understanding of non-Hermitian physics in micro-mechanical resonators. However, the strength of nonlinear damping is typically fixed by the device structure, and no general method has yet been established to design and control it after fabrication. In this study, we demonstrate a novel approach that enables on-demand control of nonlinear damping by exploiting the coupling between mechanical motion and the optical field confined in an optical cavity. Furthermore, we extend this scheme to two mechanical modes and observe cross-nonlinear damping, where the dissipation of one mode is modulated by the vibration amplitude of the other. These results establish a new platform for controlling multimode nonlinear dissipative dynamics.