高局域性的可调硅基混合表面等离子体光相位调制器

Design and Analysis of a Phase Modulator Based on a Metal-Dielectric-Silicon Hybrid Plasmonic Waveguide

设计和分析了一种可调硅基混合表面等离子体相位调制器。表面等离子体的引入打破了衍射极限的限制,使光场局域在一个纳米尺寸范围。该调制器的实现采用了两种原理:硅材料的等离子体色散效应以及聚合物的电光效应。由于器件结构的电容和寄生电阻较小,RC响应时间为3.77ps,调制带宽大约100GHz。当外加2.5V的驱动电压时,该调制器的功耗为0.9mW(相当于9fJ/bit)。光相位调制器在光通信和光互联中都有重要应用。

Electrically tunable silicon plasmonic phase modulators with nano-scale optical confinement are presented and ana- lyzed in this paper. The modulation is realized based on two mechanisms： free carrier plasma dispersion effect in silicon and high electro-optic effect in polymer. Due to its small capacitance and parasitic resistance, the RC time is 3. 77 ps, corre- sponding to a modulation bandwidth of -100 GHz. At 2.5 V applied voltage, the power consumption is P：0.9 mW（or e- quivalently 9 {J/bit）. The phase modulators can be found potential applications in optical telecommunication and intercon- nect.