Quantum Optics Seminar by Kartik Srinivasan – University of Copenhagen

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Quantum Optics Seminar by Kartik Srinivasan

Chip‐Based Signal Transducers Using Nanophotonics

Nanophotonic geometries can be used to confine light to wavelength‐scale volumes with low loss, enhancing the strength of light‐matter interactions dramatically and enabling the coherent coupling between photons and other information carriers, such as phonons, excitons, or photons of another color. Our lab has been developing such nanophotonic transducers in a variety of contexts, for applications in photonic quantum information science, sensing, and metrology. In this talk, I will give an overview of our work with a focus on two topics. First, I will describe our efforts to use silicon nanophotonics to create efficient, low‐noise, and low pump power frequency converters that can serve as an interface between short‐wavelength quantum light sources and the low‐loss 1550 nm telecommunications band. Next, I will present our development of piezo‐optomechanical circuits, in which acoustic waves are coherently controlled through their strong interactions with radio frequency and optical fields. I will endeavor to place this work in context with respect to recent related developments on topics such as microcavity Kerr frequency combs and laser cooling of nanomechanical resonators.


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 NIST Sigma Xi Young Scientist Award, the Presidential Early Career Award for Scientists and Engineers, and the US Department of Commerce Bronze Medal.