Integrated Nonlinear Photonics for Novel Efficient Heralded Single-photon Source

“这是一个物理学博士研究项目。制造技术的进步现在可以用非常低的泵浦功率在光学微结构中实现有效的非线性过程。我们的目标是探索这一快速发展的研究领域，以开发新的光子器件。在这个项目中，我们的目标是推进集成量子光子学领域，用一种新的片上预告单光子源，它只由激光和单波导组成。光子对的产生和预示过程将在非线性波导内依次发生，而不需要单独的光子分离器和光电探测器。该波导的多功能特性是基于光电半导体材料的非线性相互作用，具有很强的本征二阶和三阶非线性。该装置的设计目标是在电信系统中发射具有高光谱纯度的单光子，而预告过程将在可见光区域有效地发生，使用集成的单光子探测器在室温或接近室温的条件下工作。拟议的工作将涉及理论和分析研究，同时进行广泛的数值模拟。与主办机构内外的其他团体合作也是该项目的一部分，以证明理论预测。”

"This is a PhD research project in Physics. Advances in fabrication technologies can now enable efficient nonlinear processes in optical microstructres with very low pump powers. Our aim is to explore this rapidly-evolving research area in developing new photonic devices. In the proposed project, we aim to advance the field of integrated quantum photonics with a novel on-chip heralded single-photon source that is just composed of a laser and a single waveguide. The generation of the photon-pairs and the heralding process will occur sequentially inside the nonlinear waveguide without the need of having a separate photon-splitter and a photodetector. The multifunction feature of the proposed waveguide is based on exploiting nonlinear interactions in optoelectronic semiconductor materials with strong intrinsic second- and third-order nonlinearities. The design of the device is aimed to emit single photons with high spectral purity in the telecom regime, while the heralding process will efficiently take place in the visible region using integrated single-photon detectors operated at, or near, room temperature. The proposed work will involve theoretical and analytical research, accompanied with extensive numerical simulations. Collaboration with other groups inside and outside the host institution is also a part of the project to demonstrate the theoretical predictions."