Integrated Photonic Waveguides and Grating Couplers for InP Quantum Optics
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Authors
Shadkami, Kasra
Date
2024-05-17
Type
thesis
Language
eng
Keyword
Quantum technologies , Telecommunications , Grating couplers , Waveguide fabrication , 1550nm wavelength , Dielectric waveguides , Integrated optics , Photonics , Finite Element Method (FEM) , Computational electromagnetism , Mode analysis , Apodized gratings , Nanophotonics , Microscopy , Lithography , Deposition , Etching
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Abstract
In the field of telecommunications, the emergence of quantum technologies represents a significant advancement, promising improvements in security, speed, and efficiency. At the core of these innovations lie quantum photonic circuits, complex system with many parts and aspects. These circuits serve as essential foundations in the field of quantum technology. This thesis focuses on two critical aspects of this circuit: grating couplers and waveguides. Grating couplers designed for the critical 1550 nm wavelength are essential for modern optical communication systems. These couplers play a crucial role in integrating quantum technologies into existing infrastructure, thereby enhancing the efficiency and security of communication protocols. Meanwhile, waveguides fulfill the crucial function of confining and directing light between various circuit components.
Central to the research goals is the effort to improve grating coupling and waveguide fabrication techniques. Research on grating couplers revolves around optimizing their design to achieve higher efficiency and minimize losses. This includes uniform grating couplers and apodization, with the aim of discovering new strategies to optimize performance at the critical wavelength. Notably, in 3D simulations, apodization grating couplers show an efficiency of approximately 77$\%$ with a bandwidth of about 250 nm. Advanced fabrication techniques are carefully explored to achieve waveguides capable of precisely controlling light propagation. Additionally, significant progress has been made in identifying suitable parameters for the fabrication of 500 nm wide waveguides. This coherent approach emphasizes the comprehensive nature of research and contributes to the advancement of quantum telecommunication platforms with practical insights and experimental validation.
Exploration of grating couplers and waveguides includes theoretical fundamentals, simulation methodology, design considerations, fabrication processes, and experimental results. Through a rigorous combination of experimentation and analysis, this research aims to advance quantum telecommunication platforms, thereby facilitating the widespread adoption of secure and efficient quantum computing and communication technologies.
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Attribution 4.0 International
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.