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arXiv 1407.4977physics.opticscond-mat.mes-hall
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硅光子纳米线中光与强约束超声的相互作用

Interaction between light and highly confined hypersound in a silicon photonic nanowire

Raphaël Van Laer, Bart Kuyken, Dries Van Thourhout, Roel Baets

摘要:

在过去的十年里,在光子学和声子学之间的边界上的研究激增。大多数的努力集中在高质量光学腔中的光与运动的耦合上,通常是为了观察机械振荡器的量子态。最近预测,在纳米硅光子线中,光-声相互作用的强度将急剧增加。在这里,我们第一次展示了近红外线和千兆赫声音在小芯硅线中的巨大重叠。导线由一个小支柱支撑,以阻挡外部声子泄漏的路径,将$\mathbf{10} \; \textbf{GHz}$声子捕获在$\mathbf{0.1 \; \boldsymbolμ}\textbf{m}^{\mathbf{2}}$下方的区域中。由于我们的几何形状可以盘绕起来形成环形腔,它为腔光学力学和布里渊散射之间的完全融合铺平了道路。这一结果预示着在密集集成的硅芯片上实现低占用空间的光泵激光器/半导体激光器和延迟线。

英文摘要:

In the past decade, there has been a surge in research at the boundary between photonics and phononics. Most efforts centered on coupling light to motion in a high-quality optical cavity, typically geared towards observing the quantum state of a mechanical oscillator. It was recently predicted that the strength of the light-sound interaction would increase drastically in nanoscale silicon photonic wires. Here we demonstrate, for the first time, such a giant overlap between near-infrared light and gigahertz sound co-localized in a small-core silicon wire. The wire is supported by a tiny pillar to block the path for external phonon leakage, trapping $\mathbf{10} \; \textbf{GHz}$ phonons in an area below $\mathbf{0.1 \; \boldsymbolμ}\textbf{m}^{\mathbf{2}}$. Since our geometry can be coiled up to form a ring cavity, it paves the way for complete fusion between the worlds of cavity optomechanics and Brillouin scattering. The result bodes well for the realization of low-footprint optically-pumped lasers/sasers and delay lines on a densely integrated silicon chip.

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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