Department of Mechanical Engineering, National University of Singapore, Singapore.
Opt Lett. 2013 Sep 1;38(17):3394-7. doi: 10.1364/OL.38.003394.
In this Letter, we report an approach to controlling the bistability of double-coupled photonic crystal cavities with a nanoelectromechanical comb drive, in which the optical force and thermo-optic effect form a feedback mechanism to the effective index of the cavities, and the gap width between the cavities is steered by the comb drive. A model based on temporal coupled mode theory is established to analyze this approach. Hysteresis loops characterizing the bistability are experimentally achieved by sweeping the gap width forward and in reverse. In addition, the experiments also demonstrate that the bistability is tunable by varying the input light power.
在这封信件中，我们报告了一种通过纳米机电梳状驱动器控制双耦合光子晶体腔的双稳性的方法，其中光力和热光效应对腔的有效折射率形成反馈机制，并且通过梳状驱动器来控制腔之间的间隙宽度。建立了基于时间耦合模理论的模型来分析这种方法。通过正向和反向扫过间隙宽度来实验实现了表征双稳性的滞后环。此外，实验还表明通过改变输入光功率可以调节双稳性。
