Multichannel and Binary-Phase All-Optical Control with On-Chip Integrated Subwavelength Plasmonic Waveguides,ACS Photonics

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Multichannel and Binary-Phase All-Optical Control with On-Chip Integrated Subwavelength Plasmonic Waveguides
ACS Photonics ( IF 6.5 ) Pub Date : 2018-02-25 00:00:00 , DOI: 10.1021/acsphotonics.8b00019
Yuhan Wang ₁ , Yangguan Guo ₁ , Huimin Liao ₁ , Zhi Li ₁ , Fengyuan Gan _{1,

2} , Chengwei Sun _{1,

2} , Jianjun Chen _{1,

2,

3}

Affiliation

The control of light with light at a nanometer scale is a fundamental issue in optics. In this study, we demonstrate nanoscale all-optical control of light based on linear optics in an on-chip integrated subwavelength plasmonic waveguide system. The signal intensities of multiple output channels are all-optically manipulated simultaneously in various manners by coupling the fields of a standing wave in the main waveguide to the nearby subwavelength branch waveguides. More importantly, the phase differences between different output channels equal either 0 or π, thereby exhibiting an interesting binary characteristic. This phenomenon provides both phase robustness and switchable features, which significantly facilitate further applications at nanometer scales. As a demonstration, two output channels are used to drive a two-element plasmonic nanoantenna, and the dynamical control of the emission direction of the nanoantenna is successfully presented. The proposed control mechanism displays an ultrafast response on a femtosecond time scale. This on-chip integrated multichannel all-optical control mechanism with both the intensity and phase-controllable characteristics at the nanometer scale represents a significant advancement in the research area of all-optical control in nanophotonic integrated circuits.

中文翻译：

片上集成亚波长等离子波导管的多通道和二相全光学控制

用纳米级的光来控制光是光学中的基本问题。在这项研究中，我们证明了基于线性光学的纳米级全光学控制在片上集成亚波长等离激元波导系统中。通过将主波导中的驻波场耦合到附近的亚波长分支波导，以各种方式同时全光操作多个输出通道的信号强度。更重要的是，不同输出通道之间的相位差等于0或π，从而表现出令人感兴趣的二进制特性。这种现象提供了相位鲁棒性和可切换特性，这极大地促进了纳米级的进一步应用。作为示范，两个输出通道用于驱动一个两元素等离子体纳米天线，并成功地提出了动态控制纳米天线的发射方向。所提出的控制机制在飞秒级的时间尺度上显示了超快速的响应。这种具有纳米级强度和相位可控特性的片上集成多通道全光控制机制，代表了纳米光子集成电路中全光控制研究领域的重大进展。

更新日期：2018-02-25

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