Controllable movement of single-photon source in multifunctional magneto-photonic structures

Thi Huong Au (1, 2) , Amber Perry (2) , Jeff Audibert (3) , Duc Thien Trinh (4) , Danh Bich Do (4) , Stéphanie Buil (1) , Xavier Quélin (1) , Jean-Pierre Hermier (1) , Ngoc Diep Lai (2)

1 GEMAC - Groupe d'Etude de la Matière Condensée
2 LuMIn - Laboratoire Lumière, Matière et Interfaces
3 PPSM - Photophysique et Photochimie Supramoléculaires et Macromoléculaires
4 HNUE - Hanoi National University of Education

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 Fe3O4 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.

Domaines: Optique [physics.optics]; Physique Quantique [quant-ph]; Micro et nanotechnologies/Microélectronique

Thi Huong Au, Amber Perry, Jeff Audibert, Duc Thien Trinh, Danh Bich Do, et al.. Controllable movement of single-photon source in multifunctional magneto-photonic structures. Scientific Reports, 2020, 10 (1), pp.4843. ⟨10.1038/s41598-020-61811-8⟩. ⟨hal-02955871⟩