亚波长金属光栅的发展趋势

Development Trends of Subwavelength Metal Gratings

亚波长金属光栅具有传统光栅所不具有的特殊性质,其透射率与消光比高、光谱宽度宽、偏振性能好,是一种性能优良的光学元件,在亚波长光学元件应用领域中占据重要地位。且其体积小、结构紧凑、易于集成,在光学系统中可减少光路元件、增加系统灵活性,具有改进和取代传统光学器件的潜力。简要介绍了亚波长金属光栅理论分析方面的进展,以及金属光栅结构创新、多维发展、理论模拟向实验制备、适用波段向太赫兹及紫外波段拓展等方面的发展趋势。同时也阐述了亚波长金属光栅在激光器系统、偏振成像、光电探测、薄膜太阳能电池、光学传感等领域广泛的应用前景。

Subwavelength metal grating has special properties which the traditional grating does not have. As a kind of optical element, it has a sort of excellent performances, including high transmission and extinction ratio, wide spectrum range, great polarization properties and so on. It plays an important role in the field of applications of subwavelength optical components. Furthermore, it can reduce the optical components and increase flexibility in the optical systems due to the advantages of small volume, compact structure and easy integration. It has the potential to improve and replace traditional optical devices. This paper presents the development of the analysis theories, as well as the trends of the innovation of structures, study of multidimensional, theoretical simulation to experiment, and applicable band extending to terahertz and ultraviolet band, for the subwavelength metal gratings. It also describes the wide application prospect of the subwavelength metal grating in the fields of laser system, polarization imaging, photoelectric detection, thin film solar cells, optical sensing, etc.