M-Point Lasing in Hexagonal and Honeycomb Plasmonic Lattices
M-Point Lasing in Hexagonal and Honeycomb Plasmonic Lattices
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DOI：
10.1021/acsphotonics.1c01618
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发表时间：
2022-01
期刊：
影响因子：
7
通讯作者：
Xitlali G. Juarez;Ran Li;J. Guan;Thaddeus Reese;R. Schaller;Teri W. Odom
中科院分区：
文献类型：
--
作者：
Xitlali G. Juarez;Ran Li;J. Guan;Thaddeus Reese;R. Schaller;Teri W. Odom
本文报道了在六角形和蜂窝状等离子体纳米颗粒（NP）晶格的第一布里渊区的高对称性M点处观察到的带边态。六方晶格 M 点处的表面晶格共振 (SLRM) 由纳米粒子之间的不对称面外偶极子耦合产生。与六角晶格相反，蜂窝晶格由于其非布拉维性质而在 M 点支持两种 SLR 模式：（1）来自两个不同面外偶极 LSP 共振耦合的蓝移 SLRM1，以及（2）来自面内偶极-偶极耦合的红移 SLRM2。通过将有机染料溶液作为增益介质与 Ag NP 晶格结合在一起，我们实现了六边形和蜂窝晶格的 M 点激光发射。了解具有相同几何形状但不同晶胞的 NP 晶格中高对称点的耦合机制对于评估等离子体系统中拓扑状态的前景非常重要。
This paper reports the observation of band-edge states at the high-symmetry M-point in the first Brillouin zone of hexagonal and honeycomb plasmonic nanoparticle (NP) lattices. The surface lattice resonance at the M-point (SLRM) of a hexagonal lattice results from asymmetric out-of-plane dipole coupling between NPs. In contrast to the hexagonal lattice, honeycomb lattices support two SLR modes at the M-point because of their non-Bravais nature: (1) a blue-shifted SLRM1from the coupling of two distinct out-of-plane dipole LSP resonances, and (2) a red-shifted SLRM2from in-plane dipole–dipole coupling. By incorporating organic dye solutions as gain media with Ag NP lattices, we achieved M-point lasing from both hexagonal and honeycomb lattices. Understanding coupling mechanisms at high-symmetry points in NP lattices with the same geometry but different unit cells is important to assess the prospects of topological states in plasmonic systems.