Kerr microresonators for quantum photonics and time/frequency metrology
Abstract: Nonlinear optics in third-order (Kerr) media such as optical fibers has been the subject of a widebody of research, with entangled photon pair generation, squeezing, third harmonic generation, parametric amplification, and soliton formation amongst the topics studied. Recent advances inintegrated photonics have opened many possibilities to further investigate and utilize these phenomena in applications of relevance to quantum science research 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 nanophotonic technologies we are developing based on chip-integrated Kerr nonlinear microresonators. These include narrowband photon pair sources for quantum communications based on entanglement-swapping, in which one photon is produced in the visible and the other is produced in the telecom, 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 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, including optical frequency synthesizers and chip-scale optical atomic clocks.
Kartik Srinivasan is a Project Leader at the NIST Center for Nanoscale Science and Technology (CNST). He received B.S., M.S., and Ph.D. degrees in Applied Physics from the California Institute of Technology, where his graduate research was supported by a Fannie and John Hertz Foundation Fellowship. At the CNST, he leads projects in the field of nanophotonics, with a current focus on topics in photonic quantum information science, nonlinear optics, and optical sensors. He has been awarded the Presidential Early Career Award for Scientists and Engineers and is a Fellow of the Optical Society of America.
Host: Mohammad Hafezi and Maissam Barkeshli