论文标题
硅超材料波导启用了色散波控制
Dispersive wave control enabled by silicon metamaterial waveguides
论文作者
论文摘要
利用新频率的芯片非线性生成的能力为大量在基本和应用物理学中的应用打开了大门。分散波的激发是一个特别有趣的过程，可以通过在正常分散体中的孤子和波相匹配来有效的非线性波长转换。但是，控制集成波导中分散波的波长仍然是一个开放的挑战，阻碍了非线性光谱响应的多功能形状。在这里，我们表明超材料硅波导释放了选择分散波的波长的新自由度。基于这个概念，我们在实验上证明了在1.55μm和7.5μm附近的两个色散波的激发，从而使超宽带超脑固定会产生，从而覆盖了大部分硅透明度窗口。这些结果是硅芯片中多功能非线性频率产生的重要里程碑，具有在感应，计量和通信中应用的巨大潜力。
The ability to exploit the on-chip nonlinear generation of new frequencies has opened the door to a plethora of applications in fundamental and applied physics. Excitation of dispersive waves is a particularly interesting process that allows efficient nonlinear wavelength conversion by phase-matching of a soliton and waves in the normal dispersion regime. However, controlling the wavelength of dispersive waves in integrated waveguides remains an open challenge, hampering versatile shaping of the nonlinear spectral response. Here, we show that metamaterial silicon waveguides release new degrees of freedom to select the wavelength of dispersive waves. Based on this concept, we experimentally demonstrate excitation of two dispersive waves near 1.55 μm and 7.5 μm allowing ultra-wideband supercontinuum generation, covering most of the silicon transparency window. These results stand as an important milestone for versatile nonlinear frequency generation in silicon chips, with a great potential for applications in sensing, metrology and communications.
