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arXiv 0812.4683physics.optics
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“拉链”型光子晶体光机械腔的光机设计

Optical and mechanical design of a "zipper" photonic crystal optomechanical cavity

Jasper Chan, Matt Eichenfield, Ryan Camacho, Oskar Painter

摘要:

设计了一种能够将机械能和光能集中在纳米尺度上的双箝位梁结构。光学设计是基于光子晶体的概念,其中纳米尺度横截面光束的图案化可以导致0.2立方波长((λ_{c})^[3])的有效光学模式体积的强光学局部化。通过将两个相同的纳米梁放置在彼此的近场内,可以实现梁之间的差分运动的强光机耦合。目前设计的波长为1.5微米的薄膜氮化硅光束表明,这种结构可以同时实现7 × 10^6的光学Q因子、约40皮克的动质量m、约170 MHz的机械模式频率和有效长度L_{OM} ~ λ= 1.5微米的光机械耦合因子(g_{OM} =dω_{c}/dx = ω_{c}/ L_{OM})。

英文摘要:

Design of a doubly-clamped beam structure capable of localizing mechanical and optical energy at the nanoscale is presented. The optical design is based upon photonic crystal concepts in which patterning of a nanoscale-cross-section beam can result in strong optical localization to an effective optical mode volume of 0.2 cubic wavelengths ((λ_{c})^3). By placing two identical nanobeams within the near field of each other, strong optomechanical coupling can be realized for differential motion between the beams. Current designs for thin film silicon nitride beams at a wavelength of 1.5 microns indicate that such structures can simultaneously realize an optical Q-factor of 7x10^6, motional mass m~40 picograms, mechanical mode frequency ~170 MHz, and an optomechanical coupling factor (g_{OM}=dω_{c}/dx = ω_{c}/L_{OM}) with effective length L_{OM} ~ λ= 1.5 microns.

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。

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