Juodėnas Mindaugas, Khinevich Nadzeya, Klyvis Gvidas, Henzie Joel, Tamulevičius Tomas, Tamulevičius Sigitas
Institute of Materials Science, Kaunas University of Technology, K. Baršausko St. 59, Kaunas LT-51432, Lithuania.
Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
Nanoscale Horiz. 2024 Dec 16;10(1):142-149. doi: 10.1039/d4nh00263f.
We demonstrate a surface lattice resonance (SLR)-based plasmonic nanolaser that leverages bulk production of colloidal nanoparticles and assembly on templates with single particle resolution. SLRs emerge from the hybridization of the plasmonic and photonic modes when nanoparticles are arranged into periodic arrays and this can provide feedback for stimulated emission. It has been shown that perfect arrays are not a strict prerequisite for producing lasing. Here, we propose using high-quality colloids instead. Silver colloidal nanocubes feature excellent plasmonic properties due to their single-crystal nature and low facet roughness. We use capillarity-assisted nanoparticle assembly to produce substrates featuring SLR and comprising single nanocubes. Combined with the laser dye pyrromethene-597, the nanocube array lases at 574 nm with <1.2 nm linewidth, <100 μJ cm lasing threshold, and produces a beam with <1 mrad divergence, despite less-than-perfect arrangement. Such plasmonic nanolasers can be produced on a large-scale and integrated in point-of-care diagnostics, photonic integrated circuits, and optical communications applications.
我们展示了一种基于表面晶格共振（SLR）的等离子体纳米激光器，该激光器利用了胶体纳米颗粒的批量生产以及在具有单粒子分辨率的模板上进行组装。当纳米颗粒排列成周期性阵列时，等离子体模式和光子模式相互杂交产生表面晶格共振，这可以为受激发射提供反馈。研究表明，完美阵列并非产生激光的严格先决条件。在此，我们提议改用高质量的胶体。银胶体纳米立方体因其单晶性质和低晶面粗糙度而具有优异的等离子体特性。我们使用毛细作用辅助纳米颗粒组装来制备具有表面晶格共振且由单个纳米立方体组成的基底。与激光染料吡咯甲川-597相结合，尽管排列并不完美，但纳米立方体阵列在574纳米处产生激光，线宽小于1.2纳米，激光阈值小于100微焦/平方厘米，并产生发散角小于1毫弧度的光束。这种等离子体纳米激光器可以大规模生产，并集成到即时诊断、光子集成电路和光通信应用中。
