We demonstrate the control of resonance characteristics of a drum-type graphene mechanical resonator in a nonlinear oscillation regime using the photothermal effect, which is induced by a standing wave of light between graphene and a substrate. Unlike the resonance characteristics of a conventional Duffing-type nonlinearity, those of the nonlinear oscillation regime are modulated by the standing wave of light with a contribution of the scattered light of an actuation laser, despite a slight variation of amplitude. Numerical calculations conducted with a combination of equations of heat and motion with the Duffing-type nonlinearity explain this modulation: the photothermal effect delays the modulation of graphene stress or tension.

中文翻译：

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驻波作用下非线性状态下石墨烯鼓共振器的共振控制

我们演示了使用光热效应在非线性振荡机制中控制鼓型石墨烯机械共振器的共振特性，该光热效应是由石墨烯与基板之间的光驻波感应产生的。与传统的Duffing型非线性的共振特性不同，尽管振幅略有变化，但非线性振荡形式的共振特性是由驻波的光调制的，并由致动激光器的散射光所贡献。将热量和运动方程与Duffing型非线性结合起来进行的数值计算解释了这种调制：光热效应延迟了石墨烯应力或张力的调制。