Abstract: Modern quantum technologies depend on our ability to understand, predict, and ultimately engineer interactions between electrons, excitons, spins, and photons. In this colloquium, I will describe a method of turning quantum materials into programmable quantum systems. I will first briefly discuss how many-body GW–Bethe–Salpeter and Kadanoff–Baym approaches provide a predictive framework for the linear and nonlinear optical response of …
CREOL CalendarTitle: Inverse designed, densely integrated classical and quantum photonics Abstract: Recent breakthroughs in photonics design, along with new nanofabrication approaches and heterogeneous integration play crucial roles in building photonics for applications including optical interconnects and quantum technologies. This design breakthrough is named photonic inverse design, and refers to efficiently searching through the space of all possible photonic device geometries, within fabrication …
CREOL CalendarTitle: Prosthetic vision with a photovoltaic substitute for the lost photoreceptors Abstract: Retinal degenerative diseases lead to blindness due to loss of photoreceptors, while neurons in the inner retinal layers are still preserved. We developed a system substituting the lost photoreceptors with photovoltaic arrays. Visual information captured by a camera is projected onto the subretinal implant from augmented-reality glasses using pulsed …
CREOL CalendarMikael RechtsmanPhysics Department, Penn State University Tile: Two experiments on aperiodic photonic crystals Abstract: Photonic crystals -- transparent periodic dielectric structures -- have been called "semiconductors for light" in the sense that photons propagate through them much as electrons propagate through crystalline solids. In the first part of my talk, I will show how straining a photonic crystal can make photons …
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