用于精细光物理研究和定向单光子发射器件的单分子掺杂晶体纳米片
Single-Molecule Doped Crystalline Nanosheets for Delicate Photophysics Studies and Directional Single-Photon Emitting Devices
摘要：
固体中的单分子被认为是一类有吸引力的固态单量子系统，因为它们可以以低成本化学合成，在所需波长处具有稳定的窄跃迁。在这里，我们报告和证明单dibenzoterrylene分子在结晶蒽纳米片作为一个强大的和多功能的固态平台，精密的微物理研究和单光子器件的积木。高质量的纳米片样品使精细的单分子电子物理学在室温下的稳健研究成为可能，包括单分子插入位点跳跃的首次实时观察，偶极矩取向和幅度的相关变化的定量测量，激发功率依赖的系统间交叉速率和三重态寿命的明确测定。此外，我们展示了灵活的组装成平面天线装置的纳米片，以实现明亮的单分子发射与高斯发射模式。蒽包二苯并三萘嵌苯纳米片体系具有厚度薄、光稳定性和机械稳定性好等优点，是集成光子电路中静态量子节点的理想候选材料。
英文摘要：
Single molecules in solids have been considered as an attractive class of solid-state single quantum systems because they can be chemically synthesized at low cost to have stable narrow transitions at desired wavelengths. Here we report and demonstrate single dibenzoterrylene molecules in crystalline anthracene nanosheets as a robust and versatile solid-state platform for delicate photophysics studies and building blocks of single-photon devices. The high-quality nanosheet sample enables robust studies of delicate single-molecule photophysics at room temperature, including the first real-time observation of single molecule insertion site jump, quantitative measurements of the associated changes of dipole moment orientation and magnitude, unambiguous determination of excitation-power dependent intersystem crossing rate and triplet lifetime. Moreover, we demonstrate the flexible assembly of the nanosheets into a planar antenna device to achieve bright single-molecule emission with a Gaussian emission pattern. The thin thickness, good photostability and mechanical stability make the dibenzoterrylene-in-anthracene nanosheet system an excellent candidate of static quantum nodes in integrated photonic circuit.
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