光子带隙结构的相位测量调控及应用研究

光子带隙结构对光波可实现振幅、频率和相位的调控。基于振幅和频率特性，人们已经提出了诸多应用，但鲜有基于相位的研究，尤其是相位测量实验研究更少。作为光波的一个重要参量，相位在光波调控中起着至关重要的作用，对光子结构的相位特征进行研究，可进一步揭示光子带隙结构所蕴含的光学特性。本立项基于前期的研究基础和最新成果，致力于光学波段光子带隙结构对光波相位的调控及应用研究。在理论模拟指导下，基于全息光刻技术和电子束蒸镀技术实验制备特定的光子带隙结构；利用自搭建的相位测量系统研究带隙内反射相位对光波入射角、偏振等参量的响应特性；利用等效介质理论研究光子结构带隙外的相位特征，探究带隙光谱包络曲线特征与结构对称性之间的关联；开展一维反转对称光子结构的带隙反射相位研究，为拓扑光学量测量提供实验方案；基于实验结果探讨光子结构在光学界面态、宽带波片等方面的应用。本项目的开展将对推动微纳光子器件的发展具有重要意义。

Photonic band gap structures can control the amplitude, frequency and phase of optical wave. Utilizing the amplitude and frequency characteristics of photonic structures, many applications have been brought up, but study on phase feature is much less, especially the experimental study on phase of photonic band gap structure is rarely reported. Due to phase is an important factor on optical wave controlling, study on phase characteristics can further reveal the inherent optical properties of the photonic band gap structures..Based on previous studies and latest results, this project will focus on the study about phase controlling characteristics and applications of photonic structures with band gaps in optical band. With the guidance of simulation, specific photonic structures will be fabricated by holographic lithography and e-beam evaporation technology respectively, and the reflection phase within band gaps of prepared samples will be measured by self-built phase measurement system with high accuracy. We will thoroughly survey the response of phase within band gap on incident angle, polarization, etc. By using the effective medium theory, we will analyze the phase within the band of the photonic structure, and explore the relationship between the characteristics of the envelope curve from band gap spectrum and the structure symmetry. The reflection phase within bandgap of 1D photonic structure with reverse symmetry will be systematic studied, which will provide the feasible experimental approach for topological photonics. On these bases, we will further explore the applications of photonic structures on interface state, broad band wave plate, and so on. The project will promote the development of micro-nano photonic devices.