2D semiconductor nonlinear plasmonic modulators
2D semiconductor nonlinear plasmonic modulators
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DOI：
10.1038/s41467-019-11186-w
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发表时间：
2019-07-22
影响因子：
16.6
通讯作者：
Schaibley, John R.
中科院分区：
文献类型：
--
作者：
Klein, Matthew;Badada, Bekele H.;Schaibley, John R.
等离子体激元调制器是控制传播等离子体激元的振幅或相位的装置。在纯等离子体激元调制器中，等离子体激元泵浦波的存在或不存在控制通过通道的等离子体激元探测波的振幅。这种控制必须通过不同的等离子体波之间的相互作用来介导，通常需要非线性材料的集成。在这项工作中，我们展示了一个二维半导体非线性等离子体激元调制器的基础上WSe2单层集成在顶部的光刻定义的金属波导。我们利用WSe 2中的表面等离子体激元（SPP）和激子之间的强相互作用来给出通过装置的透射率的73%的变化。我们演示了使用光学和SPP泵浦来控制传播的SPP，实现了2D半导体非线性等离子体激元调制器，具有290 fs的超快响应时间。
A plasmonic modulator is a device that controls the amplitude or phase of propagating plasmons. In a pure plasmonic modulator, the presence or absence of a plasmonic pump wave controls the amplitude of a plasmonic probe wave through a channel. This control has to be mediated by an interaction between disparate plasmonic waves, typically requiring the integration of a nonlinear material. In this work, we demonstrate a 2D semiconductor nonlinear plasmonic modulator based on a WSe2 monolayer integrated on top of a lithographically defined metallic waveguide. We utilize the strong interaction between the surface plasmon polaritons (SPPs) and excitons in the WSe2 to give a 73 % change in transmission through the device. We demonstrate control of the propagating SPPs using both optical and SPP pumps, realizing a 2D semiconductor nonlinear plasmonic modulator, with an ultrafast response time of 290 fs.