Nonlinear microresonators for integrated quantum photonics and optical atomic clocks - Kartik Srinivasan

Nonlinear optics in third-order media such as optical fibers has been the subject of a wide body of research, with entangled photon pair generation, squeezing, third harmonic generation, parametric amplification, and soliton formation amongst the topics studied. Recent progress in integrated photonics has opened many possibilities to advance the study and application of these phenomena in quantum information science and time and frequency metrology. These new opportunities stem from the materials and geometries available to nanophotonics, which are more highly nonlinear and admit a greater amount of dispersion engineering than conventional systems, as well as the potential to use chip-scale platforms outside of a laboratory environment. In this talk, I will present an overview of several different technologies we are developing based on chip-integrated nonlinear microresonators. These include photon pair sources that can enable remote entanglement of visible wavelength quantum memories over a fiber network, quantum frequency converters that make spectrally distinct photons indistinguishable, and the heterogenous integration of deterministic single-photon emitters based on quantum dots. Finally, I will discuss our development of octave-spanning optical frequency combs, based on the formation of single soliton pulses within a microresonator, and how these devices are being used in the creation of precision metrology tools such as optical frequency synthesizers and chip-scale optical atomic clocks.