Einat Avigdor, Levy Uriel
Department of Applied Physics, The Benin School of Engineering and Computer Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Opt Express. 2011 Oct 10;19(21):20405-19. doi: 10.1364/OE.19.020405.
We study the optical force in a micro ring resonator coupled to a bus waveguide, using the coupled mode theory and a numerical Finite Element Method. We show that the resonance enhancement of the force is diminished by the opposing contributions of the attractive and the repulsive forces related to the symmetric and the anti symmetric modes in the coupling region. We show that this limiting factor can be removed by adding asymmetry to the system, e.g. by modifying one of the waveguides. Furthermore, we study for the first time a combined system in which the micro ring resonator is coupled to a one dimensional photonic crystal waveguide. This modified geometry allows further enhancement of the optical force via the combination of optical resonances and slow light effect.
我们使用耦合模理论和数值有限元方法研究了耦合到总线波导的微环谐振器中的光力。我们表明，与耦合区域中的对称模式和反对称模式相关的吸引力和排斥力的相反贡献会削弱力的共振增强。我们表明，通过给系统增加不对称性，例如修改其中一个波导，可以消除这个限制因素。此外，我们首次研究了一种组合系统，其中微环谐振器耦合到一维光子晶体波导。这种修改后的几何结构通过光学共振和慢光效应的结合，允许进一步增强光力。
