Integrated quantum photonics with nonlinear microresonators and single quantum dots

Photonic quantum information science seeks to leverage quantum phenomena such as entanglement and superposition to measure, communicate, and compute in new and potentially very powerful ways. Some of the physical resources required include the generation and measurement of quantum states of light, storage and manipulation of entanglement, and transmission of quantum information over long distances. Chip-integrated nanoscale photonic devices offer a path to realizing many such resources in a platform that can potentially be mass-produced and operated outside of a laboratory environment. In this talk, I will focus on two classes of quantum photonic technologies that we are developing based on chip-integrated nanophotonics. The first utilizes nonlinear wave-mixing in microresonators to enable the generation of photon pair states and to achieve frequency conversion of quantum states of light, including the ability to make spectrally distinct photons indistinguishable. The second utilizes single quantum emitters based on InAs/GaAs quantum dots for high-performance single-photon generation. I will end by discussing recent experiments at the intersection of the two technologies, where single photons generated by a quantum dot are frequency converted in a nonlinear microresonator, and where single quantum dot devices and nonlinear waveguides are heterogeneously integrated on a single chip. 

 
Biography:
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