Title : Chip-Based Signal Transducers Using Nanophotonics Speaker Name: Dr. Kartik Srinivasan Speaker Institution : Center for Nanoscale Science and Technology, NIST Abstract : 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 in laser cooling of nanomechanical resonators and on-chip Brillouin lasers and amplifiers.