Optical modulator based on the coupling effect of different surface plasmon modes excited on the metasurface
Optical modulator based on the coupling effect of different surface plasmon modes excited on the metasurface
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基于超表面激发的不同表面等离子体模式耦合效应的光调制器
DOI：
10.1364/ome.382116
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发表时间：
2019
影响因子：
2.8
通讯作者：
Xie Changsheng
中科院分区：
文献类型：
--
作者：
Wei Dong;Hu Chai;Chen Mingce;Shi Jiashuo;Luo Jun;Zhang Xinyu;Wang Haiwei;Xie Changsheng
设计并制作了一种由带有中心纳米柱面的阵列式纳米脊孔(NRANC)构成的准表面光学调制器。详细研究了分布在纳米脊孔每个纳米尖端和中心纳米柱体外缘的局域表面等离子体(LSP)与周期性亚表面上产生的表面等离子体极化(SPP)之间的耦合效应。锥形结构可以用来集中入射能量，也可以显著增强局域光场。在锥形结构上感应的电偶极子将调节反射或传输特性。在NRANC上形成的LSP的耦合效应将导致诱导表面电偶极子的增强，并进一步调节NRANC的光学性质。通过改变亚表面的几何参数，还可以调节LSPs模的谐振频率，观察到透射峰的移动，增强因子可达1.4×103。LSP和SPP之间的耦合将激发Fano共振。在可见光和红外范围内调节照明激光的入射角可以调制表面等离子体激发剂的刺激，从而引起透射率光谱的较大变化。通过近场光学测量，可以观察到包含表面感应电荷信息的近场光学特性，并且在45°斜入射的633nmTM激光作用下已经观察到了一个小的(x方向的∼为96 nm)明亮的热点。构建的NRANC的亚表面突出了几个潜在的应用，如滤色器，反射反射器，表面增强拉曼。
An optical modulator of a metasurface constructed by an arrayed nano-ridge-aperture with a central nano-cylinder (NRANC) is designed and fabricated. The coupling effect between the localized surface plasmons (LSPs) distributed over each nano-apex of the nano-ridge-aperture and the outer-edge of the central nano-cylinder, and the surface plasmons polaritons (SPPs) generated over the periodic metasurface, have been investigated carefully. The tapered structure can be utilized to concentrate the incident energy and also remarkably enhance the localized light-field. The electrical dipolar induced on the tapered structure will regulate the reflectance or transmission characters. The coupling effect of the LSPs formed over the NRANC will lead to an enhancement of the induced surface electrical dipolar and further regulate the optical properties of the NRANC. By varying the geometrical parameters of the metasurface, the resonance frequency of the LSPs mode can also be adjusted and the movement of transmittance peak can be viewed, and the enhancement factor would reach as large as 1.4×103. The coupling between the LSPs and SPPs would stimulate Fano resonance. Adjusting the incidence angle of illuminating lasers in the visible and infrared ranges could modulate the stimulation of SPPs, so as to induce a relatively large alteration on the transmittance spectral. Through performing the near-field optical measurements, the near-field optical characteristic including the surface induced charge information can be viewed, and a small (∼96 nm at x-direction) and bright hot-spot is already observed under 45° oblique incidence of 633 nm TM lasers. The metasurface of constructed NRANC highlights several potential applications such as color filter, reflective reflectors, surface enhanced Raman.
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影响因子：
7
作者：
Becker, Simon F.;Esmann, Martin;Lienau, Christoph
通讯作者：
Lienau, Christoph
影响因子：
4.6
作者：
Nicolas R;Lévêque G;Marae-Djouda J;Montay G;Madi Y;Plain J;Herro Z;Kazan M;Adam PM;Maurer T
通讯作者：
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影响因子：
3.8
作者：
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通讯作者：
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影响因子：
3.8
作者：
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通讯作者：
Chiaki Kuroda;Y. Ohki;M. Fujimaki
影响因子：
10.4
作者：
Desiatov, Boris;Goykhman, Ilya;Levy, Uriel
通讯作者：
Levy, Uriel