EECS500 Spring 2018 Department Colloquium

Qing Li
Integrated Photonic Circuits for Classical and Quantum Information Processing
National Institute of Standards and Technology
White 411
11:30AM - 12:30PM
February 27, 2018

In addition to being the most successful material for electronics, Silicon is also an excellent photonic material receiving widespread interest from both academia and industry. Following the tremendous success enjoyed by integrated electronics, integrated photonic circuits in Silicon hold the promise of device scaling, mass fabrication, and system-level integration, which could revolutionize many traditional photonic technologies and create a wealth of practical applications. In this talk, I will provide several such examples focused on classical and quantum information processing. In the classical domain, I will discuss the design and demonstration of compact, low-loss microcavity resonators for on-chip optical interconnects and for radio-frequency signal processing. In addition, octave-spanning frequency combs exhibiting full-spectrum phase coherence are demonstrated in compact silicon nitride microresonators, which could lead to chip-scale frequency/time standards. In the quantum domain, I will discuss the development of photonic technologies for efficient and low-noise quantum frequency conversion, an essential building block for quantum information science to bridge the frequency gap of disparate quantum nodes. The developed frequency converter has been successfully combined with photon pair sources and InAs/GaAs quantum dot emitters, thus paving the way for highly integrated quantum photonic circuits/networks in the future. 



Qing Li is a CNST/UMD Postdoctoral Researcher in National Institute of Standards and Technology. He received a B.E. in Electronics Engineering from Tsinghua University, China and a Ph.D. in the Department of Electrical and Computer Engineering from Georgia Institute of Technology. His doctoral research was supervised by Prof. Ali Adibi and focused on developing signal processing technologies in both silicon and silicon nitride platforms. His postdoctoral work with Dr. Kartik Srinivasan at NIST developed techniques for chip-scale quantum frequency conversion, octave-spanning microresonator frequency combs for optical frequency synthesis, and photonic interfaces for interrogating rubidium atomic systems. For his work, Qing Li has received the Colonel Oscar P. Cleaver Award and Sigma Xi Best Ph.D. Thesis Award from Georgia Institute of Technology. He also won the Sigma Xi Most Outstanding Poster in Modeling, Simulation and Physics in NIST.