Au Thi Huong, Perry Amber, Audibert Jeff, Trinh Duc Thien, Do Danh Bich, Buil Stéphanie, Quélin Xavier, Hermier Jean-Pierre, Lai Ngoc Diep
Laboratoire Lumière, Matière et Interfaces, FRE 2036, École Normale Supérieure Paris-Saclay, Centrale Supélec, CNRS, Université Paris-Saclay, 4 Avenue des Sciences, 91190, Gif-sur-Yvette, France.
Groupe d'étude de la matière condensée, Université Paris-Saclay, UVSQ, CNRS, 45 Avenue des États-Unis, 78035, Versailles, France.
Sci Rep. 2020 Mar 16;10(1):4843. doi: 10.1038/s41598-020-61811-8.
Quantum dot (QD) coupling in nanophotonics has been widely studied for various potential applications in quantum technologies. Micro-machining has also attracted substantial research interest due to its capacity to use miniature robotic tools to make precise controlled movements. In this work, we combine fluorescent QDs and magnetic nanoparticles (NPs) to realize multifunctional microrobotic structures and demonstrate the manipulation of a coupled single-photon source (SPS) in 3D space via an external magnetic field. By employing the low one photon absorption (LOPA) direct laser writing (DLW) technique, the fabrication of 2D and 3D magneto-photonic devices containing a single QD is performed on a hybrid material consisting of colloidal CdSe/CdS QDs, magnetite FeO NPs, and SU-8 photoresist. Two types of devices, contact-free and in-contact structures, are investigated to demonstrate their magnetic and photoradiative responses. The coupled SPS in the devices is driven by the external magnetic field to perform different movements in a 3D fluidic environment. The optical properties of the single QD in the devices are characterized.
纳米光子学中的量子点（QD）耦合已针对量子技术中的各种潜在应用进行了广泛研究。微加工也因其能够使用微型机器人工具进行精确控制运动而吸引了大量研究兴趣。在这项工作中，我们将荧光量子点和磁性纳米粒子（NPs）相结合，以实现多功能微机器人结构，并展示通过外部磁场在三维空间中对耦合单光子源（SPS）的操纵。通过采用低单光子吸收（LOPA）直接激光写入（DLW）技术，在由胶体CdSe/CdS量子点、磁铁矿FeO纳米粒子和SU-8光刻胶组成的混合材料上制造包含单个量子点的二维和三维磁光光子器件。研究了两种类型的器件，即非接触式和接触式结构，以展示它们的磁响应和光辐射响应。器件中的耦合单光子源由外部磁场驱动，在三维流体环境中执行不同的运动。对器件中单个量子点的光学性质进行了表征。
