He Shijia, Wang Yi, Wang Tianyu, Wu Dongda, La Junqiao, Hu Jiang, Xiao Jiamin, Wang Wenxin
College of Physics and Optoelectronic Engineering, Harbin Engineering University 150001 Harbin China
Qingdao Innovation and Development Center of Harbin Engineering University, Harbin Engineering University 266500 Qingdao China.
Nanoscale Adv. 2023 Jun 6;5(13):3521-3526. doi: 10.1039/d3na00160a. eCollection 2023 Jun 27.
To meet the miniaturization and compatibility of current micro-nano optical devices, two-dimensional (2D) photonic crystals (PCs), which can manipulate the optical parameters and their propagation with more degree of freedom, have become more important in nano optics. In the case of 2D PCs, the specific symmetry of the microscopic lattice arrangement determines its macroscopic optical properties. In addition, beyond this key element of lattice arrangement, the unit cell of PCs is also a critical factor in modulating the far-field optical behaviors. This work explores the manipulation of spontaneous emission (SE) of rhodamine 6G (R6G) in a square lattice of anodic aluminum oxide (AAO) membrane. The directional and polarized emissions are observed to be related to the diffraction orders (DOs) of the lattice arrangement. By further tuning the size of unit cells, different DOs are triggered to overlap with the emission of R6G, resulting in an extended tuning for directions and polarizations of light emission. It exhibits the significance for the design and application of nano optics devices.
为了满足当前微纳光学器件的小型化和兼容性需求，二维（2D）光子晶体（PCs）在纳米光学领域变得愈发重要，因为它能够以更高的自由度操控光学参数及其传播。对于二维光子晶体而言，微观晶格排列的特定对称性决定了其宏观光学性质。此外，除了晶格排列这一关键要素外，光子晶体的晶胞也是调制远场光学行为的一个关键因素。本工作探索了在阳极氧化铝（AAO）膜的方形晶格中对罗丹明6G（R6G）自发发射（SE）的操控。观察到定向和偏振发射与晶格排列的衍射级次（DOs）有关。通过进一步调整晶胞尺寸，不同的衍射级次被触发与R6G的发射重叠，从而实现了对光发射方向和偏振的扩展调谐。这展示了其在纳米光学器件设计和应用中的重要性。
