arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.00833physics.opticsphysics.app-ph
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介质谐振器中光和声的深亚波长局域化

Deep sub-wavelength localization of light and sound in dielectric resonators

Alkim Bozkurt, Chaitali Joshi, Mohammad Mirhosseini

摘要:

光机械晶体通过将声子和光子限制在相称的波长尺度上来提供声子和光子之间的耦合。我们提出了一个新的概念,设计光机械晶体能够实现前所未有的耦合率,通过限制光学和机械波深亚波长尺寸。我们的设计是基于一个电介质蝴蝶结单位细胞的有效光学/机械模式体积为$7.6 \times 10^{-3} {(λ/n_{\textrm{Si}})}^3$ / $ 1.2 \times 10^{-3} {λ_{\textrm{mech}}}^3$。我们提出的结果,从数值模拟,表明单光子光机械耦合2.2 MHz的实验可行的参数。蒙特卡罗模拟被用来证明该设计对制造无序的鲁棒性。

英文摘要:

Optomechanical crystals provide coupling between phonons and photons by confining them to commensurate wavelength-scale dimensions. We present a new concept for designing optomechanical crystals capable of achieving unprecedented coupling rates by confining optical and mechanical waves to deep sub-wavelength dimensions. Our design is based on a dielectric bowtie unit cell with an effective optical/mechanical mode volume of $7.6 \times 10^{-3} {(λ/n_{\textrm{Si}})}^3$/$ 1.2 \times 10^{-3} {λ_{\textrm{mech}}}^3$. We present results from numerical modeling, indicating a single-photon optomechanical coupling of 2.2 MHz with experimentally viable parameters. Monte Carlo simulations are used to demonstrate the design's robustness against fabrication disorder.

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