A major challenge towards nanophotonics is the integration of nanoemitters on optical chips. Combining the optical properties of nanoemitters with the benefits of integration and scalability of integrated optics is still a major issue to overcome. In this work, we demonstrate the integration of nanoemitters positioned in a controlled manner onto a substrate and onto an optical ion-exchanged glass waveguide via direct laser writing based on two-photon polymerization. Our nanoemitters are colloidal CdSe/ZnS quantum dots (QDs) embedded in polymeric nanostructures. By varying the laser parameters during the patterning process, we make size-controlled QD-polymer nanostructures that were systematically characterized using optical and structural methods. Structures as small as 17 nm in height were fabricated. The well-controlled QD-polymer nanostructure systems were then successfully integrated onto a new photonic platform for nanophotonics made of an ion-exchanged waveguide. We show that our QDs maintain their light emitting quality after integration as verified by photoluminescence (PL) measurements. Ultimately, QD emission coupled to our waveguides is detected through a home-built fiber-edge coupling PL measurement setup. Our results show the potential for future integration of nanoemitters onto complex photonic chips.

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通过在光学玻璃波导上直接激光写入实现纳米发射器的集成

纳米光子学的一个主要挑战是将纳米发射器集成到光学芯片上。将纳米发射器的光学特性与集成光学器件的集成和可扩展性优势相结合仍然是一个需要克服的主要问题。在这项工作中，我们展示了通过基于双光子聚合的直接激光写入，以受控方式将纳米发射器集成到基板和光学离子交换玻璃波导上。我们的纳米发射器是嵌入聚合物纳米结构中的胶体 CdSe/ZnS 量子点 (QD)。通过在图案化过程中改变激光参数，我们制作了尺寸受控的 QD 聚合物纳米结构，这些结构使用光学和结构方法进行了系统表征。制造了高度低至 17 nm 的结构。然后，将控制良好的 QD 聚合物纳米结构系统成功集成到由离子交换波导制成的用于纳米光子学的新光子平台上。我们展示了我们的 QD 在集成后保持其发光质量，这通过光致发光 (PL) 测量进行了验证。最终，通过自制的光纤边缘耦合 PL 测量装置检测耦合到我们的波导的 QD 发射。我们的结果显示了未来将纳米发射器集成到复杂光子芯片上的潜力。通过自制的光纤边缘耦合 PL 测量装置检测耦合到我们波导的 QD 发射。我们的结果显示了未来将纳米发射器集成到复杂光子芯片上的潜力。通过自制的光纤边缘耦合 PL 测量装置检测耦合到我们波导的 QD 发射。我们的结果显示了未来将纳米发射器集成到复杂光子芯片上的潜力。