Interplay of Cascaded Raman- and Brillouin-like Scattering in Nanostructured Optical Waveguides,ACS Photonics

当前位置： X-MOL 学术 › ACS Photonics › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Interplay of Cascaded Raman- and Brillouin-like Scattering in Nanostructured Optical Waveguides
ACS Photonics ( IF 6.5 ) Pub Date : 2017-12-07 00:00:00 , DOI: 10.1021/acsphotonics.7b01354
Roman E. Noskov _{1,

2} , Johannes R. Koehler ₂ , Andrey A. Sukhorukov _{2,

3}

Affiliation

We formulate a generic concept of engineering optical modes and mechanical resonances in a pair of optically coupled light-guiding membranes for achieving cascaded light scattering to multiple Stokes and anti-Stokes orders. Light pressure exerted on the webs swings standing- and propagating-wave flexural vibrations associated with Raman-like intramodal and Brillouin-like intermodal transitions. Due to negligible optical group velocity dispersion, the Raman-like light scattering generates a frequency comb for a single optical mode while the Brillouin-like light scattering creates inserted frequency combs with even- and odd-order side-bands appearing alternatingly in the fundamental and higher-order optical modes via exciting an effective optoacoustic grating of backward- and forward-propagating flexural phonons. Adjustment of nanoweb widths makes both these processes to occur with the same Stokes shift. As a result, the system drives intricate optomechanical patterns permitting periodic reversal of the energy flow between mechanical and optical modes. These results reveal new possibilities for tailoring light–sound interactions through simultaneous Raman-like intramodal and Brillouin-like intermodal scattering processes.

中文翻译：

纳米结构光波导中级联拉曼和布里渊散射的相互作用

我们在一对光学耦合的导光膜中制定了工程光学模式和机械共振的通用概念，以实现级联的光散射到多个斯托克斯和反斯托克斯阶。施加在腹板上的轻压力使与拉曼型内模态和布里渊型内模态过渡相关的驻波和传播波弯曲振动摆动。由于光学组速度色散可忽略不计，类似拉曼的光散射会为单个光学模式生成频率梳，而类似于布里渊的光散射会生成插入的频率梳，偶数和奇数边带交替出现在基波和基波中。通过激发向后和向前传播的弯曲声子的有效光声光栅激发高阶光学模式。纳米纤维网宽度的调节使这两个过程都以相同的斯托克斯位移进行。结果，系统驱动复杂的光学机械模式，从而允许机械和光学模式之间的能量流周期性反转。这些结果揭示了通过同时拉曼样的模态内和布里渊类的模态间散射过程来定制光声相互作用的新可能性。

更新日期：2017-12-07

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11