光子黑箱中单个分子的相干特性
Coherent characterisation of a single molecule in a photonic black box
摘要：
消光光谱是一种强有力的工具，用于演示单个量子发射体与光子结构的耦合。然而，在除了最简单的几何形状之外的所有几何形状中，从所测量的光谱推导出耦合效率的准确值可能是具有挑战性的。在这里，我们开发了一个理论框架，推导出的耦合效率从测量的透射和反射光谱没有精确的知识的光子环境。然后，我们考虑的情况下，波导中断的横向切割，其中放置一个发射器。我们将该理论应用于氮化硅波导中断的间隙填充有蒽，掺杂有dibenzoterrylene分子。我们描述了这些器件的制作，并在实验上验证了单个分子在间隙中的波导耦合。
英文摘要：
Extinction spectroscopy is a powerful tool for demonstrating the coupling of a single quantum emitter to a photonic structure. However, it can be challenging in all but the simplest of geometries to deduce an accurate value of the coupling efficiency from the measured spectrum. Here we develop a theoretical framework to deduce the coupling efficiency from the measured transmission and reflection spectra without precise knowledge of the photonic environment. We then consider the case of a waveguide interrupted by a transverse cut in which an emitter is placed. We apply that theory to a silicon nitride waveguide interrupted by a gap filled with anthracene that is doped with dibenzoterrylene molecules. We describe the fabrication of these devices, and experimentally characterise the waveguide coupling of a single molecule in the gap.
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