【摘要】 电磁波抗反射技术在太阳能电池、光学透镜、红外传感、探测器等众多应用场景中至关重要,长久以来一直是先进光学系统、光电器件研究领域热点方向之一.本文简略回顾了传统的减反的理论与方法;侧重介绍了近几年来基于亚波长人工微结构材料的电磁波减反增透相关研究进展,主要内容包括局域表面等离激元抑制光反射增强光耦合,传播表面等离激元局域共振模式诱导高透隧穿,超构材料诱导金属透明,人工微结构超表面红外、太赫兹减反等若干典型工作;探讨了亚波长人工微结构光学减反领域未来的发展方向与其所可能遇到的问题挑战.更多还原

【Abstract】 When light passes through an interface between two media with different refractive indices, part of light energy is reflected and thus causes an inevitable optical reflection. Optical anti-reflection is of great importance for applications in a wide range such as solar cells, optical lenses, infrared sensors, and photo-detectors, which has long been a research topic in the fields of optical systems and optoelectronic devices. In this article, the recent research progress of the optical anti-reflection based on subwavelength artificial engineering materials is reviewed. Having made a brief review of conventional anti-reflection methods, we focus on the overview of the newly developed techniques for optical anti-reflection, such as eliminating reflection by exciting the localized surface plasmons, the enhancement of transmission induced by the excitation of propagating surface plasmons,making metals transparent by the help of metamaterials, and the reduction of anti-reflection in long wavelength infrared and terahertz spectral ranges by using metasurfaces. Compared with the conventional anti-reflection methods, the new technique usually does not suffer the limitation of material, and it benefits from enhanced light absorption and wide incidence angle response. The new technique also enables the design of anti-reflection over wide or a multiple wavelength band. Finally, the future opportunities and challenges for further developing the subwavelength artificial engineering microstructures in optical anti-reflection are also predicted.更多还原