Future directions:
Optical read/write using semiconductor quantum point defect (QPD) within TMD heterostructures
QPDs based on wide-bandgap semiconductors (such as h-BN, MgO, and SrO) are leading materials platforms for QIS1. A key challenge for QPDs in solid-state qubit systems is the reading and writing of coherent spin states. We will address such challenges by using the time-resolved optical spin detection technique to create and to control vacancy-impurity complexes based on vdW heterostructures. For example, interfacing QPDs in semiconductors with TMDs as a means to write and read spin states through the helicity of a photon. This approach will also be developed into the near-field regime to push the spatial resolution of the QPDs excitation and readout into tens of nanometers, which will be built on the sub-micron far-field spin imaging resolution that we established in TRKR microscopy. This approach, if successful, will position vdW materials as a top candidate to realize artificial quantum-coherent systems with unprecedented functionalities.
Reference: [1] Weber, J. R., Koehl, W. F., Varley, J. B., Janotti, A., Buckley, B. B., Van de Walle, C. G. & Awschalom, D. D. Quantum computing with defects. Proc Natl Acad Sci USA 107, 8513 (2010).