We proposed an all-optical plasmonic switch based on metal-insulator-metal structures. We used the intrinsic nonlinear properties of gold to implement the switch. The proposed switch consists of a bus waveguide side coupled with a pair of asymmetric vertical cavities. We obtained the transmission spectrum of the structure for low input intensities. The results showed that a sharp dip occurs at the wavelength of 860 nm. Due to the nonlinear properties of gold and the nonlinear Kerr effects, the proposed switch has a high transmission ratio of about 0.8 mW / μm2 and a low threshold power of 0.07 mW / μm2. The threshold power of the structure with and without using the gold nanostructure shows a reduction of 50%. The result showed that the proposed switch has the potential to be applied in the plasmonic integration circuits.

中文翻译：

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基于不对称腔的等离激元开关，腔内嵌入金方形

我们提出了一种基于金属-绝缘体-金属结构的全光等离子体开关。我们利用金固有的非线性特性来实现这种开关。所提出的开关由总线波导侧与一对不对称垂直腔耦合组成。我们获得了低输入强度下结构的透射谱。结果表明，在860 nm波长处出现急剧下降。由于金的非线性特性和非线性克尔效应，所提出的开关具有约0.8 mW/μm2的高传输比和0.07 mW/μm2的低阈值功率。使用和不使用金纳米结构的结构的阈值功率显示出降低了50%。结果表明，所提出的开关具有在等离子体积分电路中应用的潜力。