【摘要】 基于蜂窝状晶格能谷光子晶体结构，通过调控能谷自由度实现了一种中红外波段谐振腔结构。该结构的拓扑波导展现出优异的单向传输特性，在工作频段内前向传输效率接近1，同时有效抑制了背向散射。在此基础上构建的谐振腔在目标频段内品质因子达到5.59×10~4。相较于常规光子晶体谐振腔，其逆参与比显著降低，最低值可达1.6，且在目标频段内均低于2，模式场分布均匀性显著提升。此外，在引入结构缺陷的情况下，谐振腔的模式分布依然保持稳定，展现出优异的缺陷容忍特性。更多还原

【Abstract】 A mid-infrared cavity is implemented herein on a valley photonic crystal structure with a honeycomb lattice via manipulation of the valley degrees of freedom. The resulting topological waveguide designed considering this structure exhibits remarkable unidirectional transmission characteristics, achieving near-unity forward transmission efficiency within the operating frequency range while effectively suppressing backward scattering. The cavity constructed on the basis of this design achieves a quality factor of 5. 59×10~4 within the target frequency range. When compared to conventional photonic crystal cavities, this mid-infrared cavity exhibits a significantly lower inverse participation ratio that reaches as low as 1. 6 and consistently remains below 2 within the target frequency range. This results in significant mode field distribution uniformity. Moreover, the mode distribution of the cavity remains stable even when structural defects are introduced.更多还原