具有零相移传输性质的超材料研究

零相移传输材料可以实现光波在数百波长传播而不引起相位变化,从而减弱了波的频谱色散问题,提高了波导间的耦合效率,因而成为光功能材料研究的热点.结合本课题组的研究工作,本文从理论和实验研究两方面对零相移传输超材料的最新进展和研究热点进行了全面地总结和评述,根据相位调制机理不同对各种零相移超材料进行了分类和归纳,进一步客观分析了各种实现方法的优、缺点及目前研究中存在的问题,并展望其未来发展方向.相关研究对拓展零相移基础物理学研究和光学器件设计具有重要意义.

Zero phase delay in metamaterials

Metamaterials with zero phase delay can guide light over hundreds of wavelengths without introducing phase variations so as to reduce the unwanted effects of frequency dispersion, which has been widely studied by researchers in the world. Based on the research works of our group, in this paper we summarize and review the latest theoretical and experimental researches and progress of metamaterials with zero phase delay. The mechanisms of phase modulations to realize zero phase delay in various metamaterials are classified and concluded. Further analyses are carried out on the characteristics and present research problems of various methods to realize zero phase delay, and the prosperous future are forecasted. We believe the related investigations are of great significance to the development of fundamental physics and the design of optical devices.