Controlling collective effects in and positioning of nanocrystals, embedded in polymer waveguides for sensing applications

该项目将结合联合收割机的最新发展，在添加剂微结构与量子光学控制的合奏发射器，构建和应用新型集成传感设备的磁场。首先，该项目将开发工具，以确定性地嵌入纳米晶体，具体地说是纳米金刚石，到三维聚合物波导与特征尺寸在微米制度。其次，该项目将观察，理解和控制氮空位中心的集体效应。具体来说，我们的目标是了解超辐射的出现和它的短时间动力学的基本量子光学水平。此外，我们将研究具有不同偶极取向的子系综之间可能的串扰。我们将使用这些知识与自旋-电荷转换一起选择性地改善一个纳米金刚石中NV中心与聚合物波导模式的耦合。第三，我们将结合联合收割机的知识与最近发明的直接激光写入的金属结构，以提供一个真正的集成磁场传感器的光纤的尖端。它将能够在生物或不透明介质（例如自旋交叉材料）中以最小距离测量磁场。因此，我们的项目将为本地和量子光学促进磁场传感铺平道路。

The project will combine recent developments in additive microstructuring with quantum optical control of ensembles of emitters to construct and apply novel integrated sensing devices for magnetic fields. First, the project will develop tools to deterministically embed nanocrystals, concretely nanodiamonds, into three-dimensional polymer waveguides with feature sizes in the micrometer regime. Second, the project will observe, understand, and control the collective effects of nitrogen-vacancy centers. Specifically, we aim at understanding the emergence of superradiance and its short-time dynamics on a fundamental quantum-optical level. Also, we will study the possible cross-talk between sub-ensembles having different dipole-orientation. We will use this knowledge together with spin-to-charge conversion to selectively improve the coupling of NV centers in one nanodiamond to the mode of a polymer waveguide. Third, we will combine this knowledge with recently invented direct laser writing of metallic structures to provide a genuinely integrated magnetic field sensor on the tip of an optical fiber. It will enable the measuring of magnetic fields at the smallest distances in biological or opaque media such as spin-crossover materials, for example. Our project will thus pave the way for local and quantum-optically facilitated magnetic field sensing.