中文摘要：

介质层上的亚波长金属光栅产生的表面等离子体（surface plasmons,SPs）可以极大地增强光栅下介质层内的透射光强.增强作用从500nm延续到近红外区域.在波长610nm附近有接近110%的增强,在波长700nm及740nm处也有180%左右的增强.而这个波长范围与薄膜太阳能电池的吸收谱很相近,因此这种结构有望大幅度提高薄膜太阳能电池及不同波长光探测器等光电转换器件的光耦合效率.

英文摘要：

Surface plasmons（SPs） generated in nano metallic gratings on medium layer can greatly enhance the transmission field through the metallic gratings. The enhancement effect is achieved from λ=500 nm to near-infrared domain. The enhancement rate is about 110% at the wavelength of about 610 nm and about 180% at λ=700 nm and 740 nm where most kinds of thin film solar cells have a high spectral response. These structures should provide a promising way to increase the coupling efficiency of thin film solar cells and optical detectors of different wavelength response.