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光梯度力作为纳谐振器的一种新型驱动方式,得到了广泛关注.本文研究了光梯度力的固有非线性特性,建立了光梯度力驱动圆环与辐条谐振系统的动力学模型.揭示了入射光功率以及几何参数对系统的非线性动力学响应的影响规律.研究表明:光梯度力会引起系统呈现刚度软化效应,随着入射光功率增大,系统主共振峰值明显增大,且谐振频率随着振幅增大而产生较大偏移;两环初始间隙增大,系统振动幅值和谐振频率均下降;辐条厚度越大,系统主共振峰值和谐振频率均减小.因此,可以通过调节入射光功率来实现圆环辐条谐振器的频率调节,为光梯度力驱动纳谐振器动力学设计和性能预测提供理论参考.
As a new type of driving method of nanocavals, optical gradient force attracts much attention.In this paper, the inherent nonlinearity of optical gradient force is studied, and the dynamic model of optical gradient force driving ring and spoke resonance system is established. The influence of incident light power and geometric parameters on the nonlinear dynamic response of the system is studied.The results show that the optical gradient force will cause the system to exhibit the stiffness softening effect and the main resonance peak of the system increases obviously with the incident light power increasing, The frequency increases with the amplitude of the larger offset; the initial gap between the two rings increases, the system vibration amplitude and resonant frequency are decreased; the greater the thickness of the spoke, the system main resonance peak and resonant frequency are reduced.Therefore, Adjusting the incident light power to realize the frequency adjustment of circular spoke resonators provides a theoretical reference for the dynamic design and performance prediction of nanocavals driven by optical gradient force.