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Generating, Enhancing, and Leveraging Nonlinear and Electro-Optic Effects in Silicon-Based Waveguides.

机译：在基于硅的波导中生成，增强和利用非线性效应和电光效应。

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摘要

In integrated photonics, most fundamental device functionalities rely on nonlinear or electro-optic phenomena, and optical waveguides with higher second- and third-order nonlinear coefficients are generally desirable for high-efficiency modulators and wavemixers. Silicon, despite being a material of interest due to its prevalence in the electronics industry, intrinsically lacks a second-order nonlinear susceptibility, so a great deal of work in the literature has been focused on circumventing this shortcoming by either (1) relying instead on free-carrier plasma dispersion or (2) generating strain-induced second-order effects. This dissertation focuses primarily on providing a comprehensive study of the nonlinear effects in silicon waveguides, with the intent of determining which phenomena and consequent waveguide designs are the most desirable for achieving modulation and wavemixing, respectively. A detailed analysis is additionally applied to the integration of silicon with other media with favorable optical properties, with the goal of designing hybrid waveguides with enhanced nonlinear coefficients. Electro-optic and wavemixing measurements are performed using combination fiber, integrated, and free-space optical setups, and the experimental data show conclusively that conventional silicon waveguide topologies may be modified to improve the performance of modulators and wavemixers in terms of (1) energy efficiency, (2) device footprint, and (3) speed. This work is intended to contribute to the study of nonlinear integrated photonics, ideally advancing the ongoing assimilation of the field by electronics and leading to the eventual design of hybrid photonic-electronic circuits.
机译：在集成光子学中，大多数基本设备功能都依赖于非线性或电光现象，对于高效调制器和混频器，通常需要具有较高二阶和三阶非线性系数的光波导。尽管硅由于其​​在电子工业中的普遍性而成为人们感兴趣的材料，但它本质上缺乏二阶非线性磁化率，因此，文献中的大量工作都集中在通过（1）依赖于自由载流子等离子体弥散或（2）产生应变诱导的二阶效应。本文主要着眼于对硅波导中的非线性效应进行全面的研究，目的是确定哪种现象和随之而来的波导设计分别是实现调制和混波最理想的。为了设计具有增强的非线性系数的混合波导，还对硅与具有良好光学特性的其他介质的集成进行了详细分析。使用组合光纤，集成和自由空间光学装置进行电光和波混测量，实验数据最终表明，可以对常规的硅波导拓扑进行修改，以提高（1）能量方面的调制器和波混器的性能。效率，（2）设备占用空间和（3）速度。这项工作旨在为非线性集成光子学的研究做出贡献，理想地促进电子领域不断进行的同化，并最终实现混合光子电子电路的设计。

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  • 作者

    Puckett, Matthew Wade.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Electrical engineering.
  • 学位 Ph.D.
  • 年度 2016
  • 页码 134 p.
  • 总页数 134
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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