声光子晶体带隙特性与声光耦合作用研究综述

声光子晶体是一种同时具有光子和声子带隙的周期性结构.声光子晶体为同时控制电磁波和弹性波的传播提供了一个系统的平台,并在光学、声学及声光多功能器件、腔光力学等领域展现了十分广阔的应用前景.论文首先介绍了声光子晶体的基本概念,包括声光子晶体的材料、空间周期分类、能带结构的计算方法等;阐述了不同体系下声光子晶体双重带隙的特性,以及拓扑优化方法在声光子晶体带隙优化方面的应用;然后简要介绍了腔光力学,以及计算声光耦合作用的准静态方法和光力耦合系数方法,并针对当前各种声光子晶体结构中声光耦合作用的研究进行了阐述;还进一步介绍了声光子晶体波导和传感器的相关研究;最后,基于当前声光子晶体的研究进展对未来的研究方向进行了展望,其中涉及到增强声光子晶体谐振腔的声光相互作用、三维声光子晶体的研究、声光超构材料的设计、声光子晶体器件设计与应用等.

REVIEW OF BANDGAP CHARACTERISTICS AND ACOUSTO-OPTICAL COUPLING IN PHOXONIC CRYSTALS

Phoxonic crystals are periodic structures which possess photonic and phononic bandgaps simultaneously. Phoxonic crystals can be applied as systematic platforms for manipulating electromagnetic and elastic waves simultane-ously, and can be utilized in various fields such as optical, acoustic and acouto-optical devices, and cavity optomechanics. This paper firstly introduces the basic concepts of phoxonic crystals, including the constituting materials, their classifi-cations according to spatial periodicity, the numerical calculation methods of band structures. We elaborate the charac-teristics of phoxonic dual bandgaps for different systems, and the topology optimization method applied in optimizing the bandgap width of phoxonic dual bandgaps. The field of cavity optomechanics, as well as the quasistatic method and optomechanical coupling coefficient method for evaluating the acousto-optical coupling strength are introduced. The acousto-optical coupling phenomena in various phoxonic crystal structures are summarized. Then this paper introduces the research works related to phoxonic crystal waveguides and sensors. Finally, we outline the prospects of phoxonic crystals based on state of the art, including the enhancements of acousto-optical interaction in phoxonic crystal cavities,the investigations of three-dimensional phoxonic crystals, the designs of different phoxonic metamaterials, the phoxonic crystal device designs and related applications, and so on.