分子发射晶体的气相组装用于光子集成电路
Vapor Phase Assembly of Molecular Emitter Crystals for Photonic Integrated Circuits
AI总结：
本文提出了一种气相生长方法，用于制备适用于集成纳米光子学的光学薄DBT掺杂蒽晶体，实现分子偶极子与光学模式的对齐，为芯片上单光子源和集体多发射体效应提供新路径。
摘要：
有机分子嵌入有机基质中，在低于3K的极低温下表现出寿命受限的光学相干性和明亮发射。本文提出了一种简单的气相生长方法，用于合成光学薄的DBT掺杂蒽晶体，这些晶体与集成纳米光子学兼容。晶体厚度约为200纳米，表面粗糙度低于纳米级，横向尺寸可调至200微米。分子跃迁保持狭窄且光谱稳定，不均匀展宽低于100GHz，与 bulk 蒽晶体中的DBT相当。掺杂密度可调至每平方微米数百分子，确保发射体位于纳米光子结构的近场内。我们证明晶体可微定位到集成光子器件上，分子偶极子与光学模式对齐。这种方法为芯片上单光子源和集体多发射体效应开辟了道路。
英文摘要：
Organic molecules embedded in an organic matrix exhibit lifetime-limited optical coherence and bright emission at cryogenic temperatures below 3 K. Here we present a simple vapor-phase growth method for synthesizing optically thin DBT-doped anthracene crystals that are compatible with integrated nanophotonics. The crystals are ~200 nm thick with sub-nm surface roughness and a tunable lateral dimension of up to 200 $μ$m. The molecular transitions remain narrow and spectrally stable, with inhomogeneous broadening below 100 GHz, comparable to DBT in bulk anthracene. The dopant density is tunable up to several hundred molecules per $μ$m$^2$, ensuring emitters within the near-field of nanophotonic structures. We demonstrate that the crystals can be micropositioned onto integrated photonic devices with the molecular dipole aligned to the optical mode. This approach opens a path toward on-chip single-photon sources and collective many-emitter effects.
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