Light management at nanometric dimension for boosting the enhancement of photo luminescence from Lanthanide doped up-conversion nanoparticles (UCNPs) has evidenced epochal advancement attributed to their conspicuous emission properties and plethora of potential applications. In this work, a multiscale funnel shape three dimensional (3D) anodized aluminum oxide (AAO) nanowire topography is explored to improve up-conversion luminescence (UCL) of synthesized core shell (C/S) NaYF₄:Yb³⁺,Tm³⁺/NaYF₄ UCNPs dispersed in chloroform. The different hexagonally arranged AAO topographies, based on cost-effective and modified self-aggregation fabrication method, are presented. These unique topographies of nanowire structures provide archetypal for enhanced UCL and have been investigated to study the effect of light management in detail. The systematic studies indicate that UCL enhancement is substantiated by the prolonged light path due to multiple scattering, and guided modes in the length of nanowire structures with the modified surface topography hoisted by capillary force inside the nanowires. The length of the nanowire and structure’s topographies are endorsed as structural parameters to tune the reflection as well as resonance mode for tuning the enhancement. The overall UCL enhancement for an optimized wire length and surface topography of AAO substrate is found to be ∼ 115 fold in ultra-violate regime at low excitation power density.

用于增强镧系元素掺杂的上转换纳米粒子 (UCNP) 的光致发光的纳米级光管理已证明具有划时代的进步，这归因于它们显着的发射特性和大量的潜在应用。在这项工作中，探索了多尺度漏斗形三维 (3D) 阳极氧化铝 (AAO) 纳米线形貌以改善合成核壳 (C/S) NaYF ₄ :Yb ³⁺ ,Tm ^{3 的上}转换发光 (UCL) ⁺ /NaYF ₄UCNPs 分散在氯仿中。介绍了基于成本效益和改进的自聚集制造方法的不同六边形排列的 AAO 形貌。这些独特的纳米线结构形貌为增强型 UCL 提供了原型，并已被研究以详细研究光管理的影响。系统研究表明，UCL 增强是由多重散射导致的延长光路和纳米线结构长度中的导模所证实的，纳米线结构的表面形貌被纳米线内部的毛细管力提升。纳米线的长度和结构的形貌被认可为结构参数以调整反射以及调整增强的共振模式。