Presentations

    Optical Metamaterials and their Index of Refraction, at University of Ghent, Ghent, Belgium, Friday, November 19, 2021:
    Nanotechnology has enabled the development of nanostructured composite materials (metamaterials) with exotic optical properties not found in nature. In the most extreme case, we can create materials which support light waves that propagate with infinite phase velocity, corresponding to a refractive index of zero, and materials where waves stop propagating, yielding extreme localization of light. In this lecture we will (interactively!) explore some of these unusual phenomena.
    The surprising world where optical properties approach zero, at Bertman Lecture, Wesleyan University, Tuesday, May 2, 2023:
    Nanotechnology has enabled the development of nanostructured composite materials (metamaterials) with exotic optical properties not found in nature. In the most extreme case, we can create materials which support light waves that propagate with infinite phase velocity, corresponding to a refractive index of zero. We have developed a variety of in-plane metamaterial designs that permit obtaining a refractive index of zero in the optical regime. We will report on some of the exotic physics of zero-index metamaterials, including strong enhancement of nonlinear optical phenomena. We can also... Read more about The surprising world where optical properties approach zero
    Metamaterials for extreme optics, at Physics Colloquium, Boston College, Chestnut Hill, MA, Wednesday, November 1, 2023:
    Nanotechnology has enabled the development of nanostructured composite materials (metamaterials) with exotic optical properties not found in nature. In the most extreme case, we can create materials which support light waves that propagate with infinite phase velocity, corresponding to a refractive index of zero, and materials where waves stop propagating, yielding extreme localization of light. In this lecture we will (interactively!) explore some of these unusual phenomena.