Dr. Sergey V. Polyakov is a physicist in the Quantum Optics group in the Quantum Measurement Division of the Physical Measurement Laboratory. Before becoming a staff member at NIST in 2013, Dr. Polyakov served as a guest researcher at NIST and JQI since 2005 and held a post-doctoral position at Caltech with H. Jeff Kimble, where he built and characterized an atomic ensemble-based quantum memory.