Novel Material-Based High-Performance Photodetector for Advanced Applications
Open AccessIn recent years, the integration of two-dimensional (2D) materials withsilicon photonics has faced limitations due to the ultra-thin nature of these materials, resulting in reduced interaction between light and matter and lower efficiency in silicon photonics. Another challenge arises from the low-speed response of certain materials due to their carrier mobilities. Additionally, the footprint of silicon photonics is fundamentally limited by the diffraction limit. However, in this thesis, a groundbreaking solution has been discovered and demonstrated, addressing all these issues through the introduction of a novel photodetector scaling theory. The novel photodetector scaling theory proposed in this thesis tackles the challenges associated with integrating 2D materials into silicon photonics. By leveraging this theory, researchers have overcome the limitations imposed by the ultra-thin nature of these materials. The theory provides a comprehensive understanding of the factors influencing the light-matter interaction and enables the optimization of the integration process. Through careful material selection and device design, the efficiency of the photodetectors has been significantly enhanced. Furthermore, the thesis addresses the issue of low-speed response in certain materials by exploring strategies to improve carrier mobility. By utilizing innovative material engineering techniques, carrier mobility has been enhanced, enabling faster response times and better overall performance in photodetectors. In addition to resolving the limitations related to material properties, the thesis also tackles the fundamental constraint of footprint vi size imposed by the diffraction limit in silicon photonics. By incorporating advanced nanofabrication techniques and novel device architectures, researchers have managed to overcome this limitation. The result is the development of compact photodetectors that maintain high performance while occupying a significantly smaller footprint compared to conventional designs. The findings presented in this thesis not only address the challenges associated with integrating 2D materials into silicon photonics but also provide a comprehensive framework for future advancements in this field. The novel photodetector scaling theory, along with the innovative approaches to improve speed performance and overcome diffraction limit constraints, paves the way for the full exploitation of the potential of 2D materials in conjunction with silicon-based photonic systems. Overall, this thesis represents a significant milestone in the field, offering a solution to the limitations faced when integrating 2D materials with silicon photonics. The research provides valuable insights and practical techniques that can revolutionize the development of high-performance photodetectors, enabling their seamless integration into various applications, including next-generation optoelectronics and nanoelectronic devices.
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