arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0908.0025physics.optics
收藏

光机械晶体中局域光模和机械模的色散耦合和损耗的模拟

Modeling Dispersive Coupling and Losses of Localized Optical and Mechanical Modes in Optomechanical Crystals

Matt Eichenfield, Jasper Chan, Amir H. Safavi-Naeini, Kerry J. Vahala, Oskar Painter

摘要:

周期性结构的材料可以承受由几何形状定制的光学和机械激发。在这里,我们分析了色散耦合平面光子和声子晶体的性质:光机械晶体。特别地,研究了准一维(图案化纳米梁)和准二维(图案化膜)几何结构中的共谐振光学和机械腔的性质。结果表明,在这些结构中的机械Q和光机械耦合可以变化许多数量级的几何形状的适度变化。一个直观的图片开发的基础上,扰动理论的材料边界的变化,使光学机械性能进行设计和优化。提出了几种设计,机械频率约为1-10 GHz,光学Q因子Qo > 10^7,运动质量meff 100毫微微克,光机耦合长度L0 M < 5微米,辐射限制的机械Q因子Qm > 10^7。

英文摘要:

Periodically structured materials can sustain both optical and mechanical excitations which are tailored by the geometry. Here we analyze the properties of dispersively coupled planar photonic and phononic crystals: optomechanical crystals. In particular, the properties of co-resonant optical and mechanical cavities in quasi-1D (patterned nanobeam) and quasi-2D (patterned membrane) geometries are studied. It is shown that the mechanical Q and optomechanical coupling in these structures can vary by many orders of magnitude with modest changes in geometry. An intuitive picture is developed based upon a perturbation theory for shifting material boundaries that allows the optomechanical properties to be designed and optimized. Several designs are presented with mechanical frequency ~ 1-10 GHz, optical Q-factor Qo > 10^7, motional masses meff 100 femtograms, optomechanical coupling length LOM < 5 microns, and a radiation-limited mechanical Q-factor Qm > 10^7.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑