Tuesday, November 21, 2017 at 12:20pm to 1:45pm
Clark Hall, 700
Marko Loncar, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, will present seminar. Professor Gennady Shevets, A&EP, host.
Seminar Title: Nanophotonics with ‘difficult’ materials
Abstract: Lithium niobate (LN) is an “old” material with many applications in optical and microwave technologies, owing to its unique properties that include large second order nonlinear susceptibility, large piezoelectric response, wide optical transparency window and high refractive index. Conventional bulk LN components, including modulators and periodically polled frequency converters, have been the workhorse of the optoelectronic industry. They are reaching their limits, however, as they rely on weakly guiding ion-diffusion defined optical waveguides in bulk LN crystal. I will discuss our efforts aimed at the development of integrated LN platform, featuring sub-wavelength scale light confinement and dense integration of optical and electrical components, that has the potential to revolutionize optical communication and microwave photonics.
Diamond possesses remarkable optical material: it is transparent from the ultra-violet to infrared, has a high refractive index, strong optical nonlinearity (Kerr and Raman) and a wide variety of light-emitting defects. These properties make diamond a highly desirable material for many applications, including quantum and nonlinear photonics, high power optics and optomechanics. In my talk, I will review the advances in nanotechnology that have enabled fabrication of nanophotonic components and chip-scale systems in diamond, including quantum networks based on silicon-vacancy (SiV) color centers, and frequency combs and Raman lasers.