Otto结构表面等离子体波光调制器模拟计算

详细信息

Numerical simulation of Otto structure in surface plasma wave light modulator

摘要: 根据受抑全内反射(FTIR)光调制器的原型,结合金属表面受激所产生的表面等离子体波(SPW)与p偏振光共振并吸收光能量的性质,设计了Otto结构的SPW光调制器,通过改变Otto结构中空气间隙的大小或入射角的大小这两种方式对入射光进行调制。针对Cu,Al,Ag3种金属以及1.064μm和0.532μm两种波长激光的情况下进行了模拟计算。结果表明,改变入射角方式的调制效果更佳,0.5°的入射角改变所引起的反射率R的变化量可达0.9以上。
- 光调制器 /
- 表面等离子体波 /
- Otto结构 /
- 受抑全内反射
Abstract: On the foundation of frustrated total internal reflect ion (FTIR) light modulator,combining the character of surface plasma wave (SPW) which is excitated on the surface of metal and can be resonant with ppolari zation light and absorbs its energy,a modified type SPW light modulator of Otto structure is designed.In Otto structure,the reflectivity can be modulated by changing thickness of air gap or the angle of incidence.The numerical simulation is made in the situation of three kinds of metal:Cu,Al,Ag and two wavelengths:1.06 4μm,0.532μm,and the results show that modulate effect of the method of changi ng angle of incidence is better,0.5°of the angle change can result in reflectivity's variety value is above 0.9.
- light modulator /
- surface plasma wave (SPW) /
- Ottostructure /
- frustrated total internal reflection (FTIR)

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