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Department of Physics and Astronomy
University of Mississippi

Events

Event Information:

  • Tue
    12
    Nov
    2019

    Colloquium: A Path Toward Spin-Based Quantum Technologies — Creating, Controlling, and Characterizing Quantum Emission

    4:00 pmLewis Hall 101

    Annemarie Exarhos
    Department of Physics
    Lafayette College

    A Path Toward Spin-Based Quantum Technologies — Creating, Controlling, and Characterizing Quantum Emission

    Optically-active point defects in wide-bandgap semiconductors are the basis for rapidly expanding quantum technologies in nanoscale sensing and quantum information processing. Most research has focused on three-dimensional host materials such as diamond and silicon carbide, where quantum mechanical spin states can be optically addressed. In recent years, the two-dimensional van der Waals material hexagonal boron nitride (hBN) has emerged as a robust host for bright, stable, room-temperature quantum emitters (QEs). However, many questions persist regarding the chemical and electronic structure of the defects responsible for emission as well as the potential role of spin-related effects. Significantly complicating the identification of these QEs is the heterogeneity of optical and magnetic characteristics observed.

    I will discuss work regarding our studies of the optical and magnetic properties of QEs in hBN films, characterized via confocal fluorescence microscopy. In particular, I will report on our recent observations of magnetic-field dependent emission in some QEs that, if able to be well-isolated and controlled, could enable the realization of spin-based quantum technologies using low-dimensional van der Waals heterostructures.