Princeton University

School of Engineering & Applied Science

Using Every Last Photon: Tools for Characterizing, Discovering and Exploiting Solid-State Emitters

Professor Rashid Zia, Brown University
Engineering Quadrangle, B205
Monday, April 3, 2017 - 12:30pm

The ability to identify and control individual emitters has helped to dramatically expand the field of optics and photonics. For example, point defects in solid-state hosts have rapidly emerged as one of the leading systems for quantum information science. However, the experimental study of these systems suffers from a number of fundamental challenges, and the identification of new solid-state emitters for quantum light-matter interfaces has been an ad hoc process.

This talk will present our group's recent work to integrate computational and experimental methods to address these challenges. In particular, we will demonstrate how analytical and numerical techniques, particularly convex optimization, group theory, and machine learning, can help change how experimental data is acquired and analyzed to explore and predict new phenomena.

First, we will present an experimental method that combines Fourier imaging, optical spectroscopy, and convex optimization to simultaneously acquire the complete energy, momentum, and polarization distribution of light-emission in a single measurement. Then, we will present a computational package for electronic structure calculations in all 32 crystallographic point groups that could provide a scalable method to identify promising emitter-host systems. Finally, we will demonstrate how machine learning can be applied to the tomography of 13C nuclear spins in dynamical decoupling measurements of diamond NV centers.

Biography: Rashid Zia is an Associate Professor of Engineering and Physics at Brown University. His research group works at the interface of electrical engineering, materials science, optical physics, and physical chemistry to study how light interacts with solid-state quantum emitters, including atoms, defect centers, ions, molecules, and quantum dots. For this work, he has received a National Science Foundation CAREER Award and a Department of Defense nominated Presidential Early Career Award for Scientists and Engineers (PECASE). Rashid is a Fellow of the Optical Society of America, and has also served as a Fellow of the National Forum on the Future of Liberal Education. He is also the lead PI for an ongoing Multidisciplinary University Research Initiative (MURI) on Quantum Metaphotonics & Metamaterials sponsored by the Air Force Office of Scientific Research.