Manipulation of solid-state single-photon emitters by deterministic coupling into polymer-based photonic structures
- Authors
- Publication Date
- Nov 20, 2023
- Source
- Hal-Diderot
- Keywords
- Language
- English
- License
- Unknown
- External links
Abstract
In this thesis, we focus on utilizing low-one photon absorption (LOPA) direct laser writing (DLW) to precisely couple colloidal quantum dot (QD)-based single photon emitters (SPEs) into multidimensional polymeric structures. The research is segmented into four parts :The first part presents the optical properties of CdSe/CdS core/shell nanocrystals. We optimize single-photon emission and study the orientation of emitting dipoles within the QDs. We identify our QDs as suitable candidates for integration into photonic structures.The second part details the mechanism of LOPA-based DLW to couple QDs into arbitrary photonic structures based on SU-8 negative photoresist. Next, a particular focus on the circular waveguide resonant grating structure allows us to customize far-field radiation patterns of QD-based SPEs. The findings here contribute to the understanding of optical properties of concentric circular grating structures using low refractive index polymer materials.The third part showcases an approach to optical splitters and combiners using vertical polymeric submicropillar structures operating at the single-photon level. Several architectural configurations are introduced. The results represent advancement toward future quantum optical interconnects based on evanescent wave coupling in vertical configuration.The fourth part explores quantum optical splitters based on a 3D polymeric crossed-arc waveguide structure. This approach provides advantages as it is more mechanically stable than submicropillar structures and has potential for scalability.In conclusion, this thesis provides a framework for deterministically coupling single QDs into polymeric photonic structures using LOPA-based DLW, advancing the field of integrated quantum photonics. Future work could focus on optimizing structures for improved efficiency and scaling the 3D waveguides for more complex configurations.
