Quantum efficiency is a key quantity that describes the performance of light-emitting materials and is, thus, an important metric for assessing novel nanophotonic systems. This Perspective provides a concise discussion of the difficulties encountered in the characterization of quantum efficiencies, especially for studies that involve single emitters. In particular, we review various approaches that have been recently used for determining quantum efficiencies of emitters coupled to plasmonic antennas and highlight the subtleties and challenges that hinder precise measurements.

中文翻译：

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关于量子效率测量和等离子天线

量子效率是描述发光材料性能的关键参数，因此是评估新型纳米光子系统的重要指标。本视角简要讨论了量子效率表征中遇到的困难，特别是对于涉及单个发射器的研究。特别是，我们回顾了最近用于确定耦合到等离子体天线的发射器的量子效率的各种方法，并强调了阻碍精确测量的微妙之处和挑战。