Nano-optomechanical Actuator and Pull-Back Instability

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• 作者：Min Ren ; Jianguo Huang ; Hong Cai ; Julius Minglin Tsai ; Jinxiong Zhou ; Zishun Liu ; Zhigang Suo ; Ai-Qun Liu
• 刊名：ACS Nano
• 出版年：2013
• 出版时间：February 26, 2013
• 年：2013
• 卷：7
• 期：2
• 页码：1676-1681
• 全文大小：419K
• 年卷期：v.7,no.2(February 26, 2013)
• ISSN：1936-086X

文摘

This paper studies the nonlinear behavior of a nano-optomechanical actuator, consisting of a free-standing arc in a ring resonator that is coupled to a bus waveguide through evanescent waves. The arc deflects when a control light of a fixed wavelength and optical power is pumped into the bus waveguide, while the amount of deflection is monitored by measuring the transmission spectrum of a broadband probe light. This nanoactuator achieves a maximal deflection of 43.1 nm, with a resolution of 0.28 nm. The optical force is a nonlinear function of the deflection of the arc, leading to pull-back instability when the control light is red-tuned. This instability is studied by a combination of experiment and modeling. Potential applications of the nanoactuator include bio-nanomotor, optical switches, and optomechanical memories.

Keywords:

nanoelectromechanical systems; nanoactuator; pull-back effect; optical force