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首页> 外文会议>Physics and simulation of optoelectronic devices XXIII >Propagation characteristics of multilayered subwavelength gratings composed of metallic nanoparticles
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Propagation characteristics of multilayered subwavelength gratings composed of metallic nanoparticles

机译：金属纳米粒子组成的亚波长多层光栅的传输特性

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摘要

The absorption and reflection characteristics of multilayered nanoplasmonic gratings with sub wavelength sizes are analyzed in details by using an efficient finite element method. The multilayered structures are composed by several layers of nanoparticles of metals such as Silver, Gold and Aluminum embedded in dielectric such as amorphous silicon over a metallic substrate. The propagations characteristics for several geometrical configurations are obtained and a broadband reflection or absorption covering the near infrared wavelengths has been observed. The proposed nanoplasmonic structures have a great potential for applications in photovoltaic cells or polarizers by improving their reflection or absorption efficiency. Peaks of reflection or absorption larger than 80% were obtained and their performance over the near infrared can be improved by adequately tuning their geometrical parameters, the refractive index and thickness of the layers as well as the nanoparticles shape and size.
机译：通过使用有效的有限元方法，详细分析了亚波长尺寸的多层纳米等离子体光栅的吸收和反射特性。该多层结构由嵌入在诸如金属硅之类的电介质中的金属衬底上的诸如银，金和铝之类的金属纳米颗粒的几层组成。获得了几种几何构型的传播特性，并观察到了覆盖近红外波长的宽带反射或吸收。所提出的纳米等离子体结构通过提高它们的反射或吸收效率而在光伏电池或偏振器中具有巨大的应用潜力。获得了大于80％的反射或吸收峰，可以通过适当调整其几何参数，层的折射率和厚度以及纳米粒子的形状和尺寸来改善其近红外性能。

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