Research Projects

The efficient control of the light-matter interaction at the fundamental level, i.e., single quanta level, and the experimental realizations of such a system are challenging tasks in contemporary physics, with potential applications in quantum technologies. The present project proposal aims to design and implement a quantum network node using a nanodiamond-based single quantum emitter with an efficient nanophotonic interface. The essential point is that the electromagnetic field is strongly confined due to the sub-wavelength dimensions of the nanophotonic tip. Thus, the spontaneous emission for a nanodiamond-based single quantum emitter placed in the vicinity of the nanophotonic tip is strongly modified. As a result, a significant portion of the spontaneous emission is channeled into guided modes of the nano-photonic tip. The intensity correlation for a nanodiamond-based single quantum emitter fluorescence emission through guided modes shows photon anti-bunching behavior. Key technologies will be established during the project period. One is to develop high-quality nanophotonic tips using tapered fiber technology. The other is to create a novel method to deposit a nanodiamond-based single quantum emitter directly on the surface of the nanophotonic tip using an inverted microscope combined with micro/nano-fluidic technology. The key point is a nanophotonic tip is used to pick up sub-pico liter liquid drop in a controllable way due to the dimension of the nanophotonic tip itself, which acts as a nano-spatial filter. The proposed project is a unique development with significant applications in scientific and industrial research, specifically in advanced quantum photonic research studies. The proposed inline fiber method can be applied to other nanowaveguides, providing flexible new technology and opening a novel route to realizing quantum networks. The proposed nanostructures will be used in various research fields like quantum optics, chiral quantum optics, diamond nanophotonics, nanophotonics, cavity quantum electrodynamics, and bio-sensing.