1. Photonics Laboratory, Computer, Electrical, and Mathematical Sciences and Engineering Division (CEMSE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
2. Currently with the Nanophotonic Device Research Center Korea Photonics Technology Institute (KOPTI) Gwangju 61007 Republic of Korea
3. Light Source Research Division Korea Photonics Technology Institute (KOPTI) Gwangju 61007 Republic of Korea
4. Physical Science and Engineering Division (PSE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
5. Currently with the Department of Electrical Engineering Stanford University Stanford CA 94305 USA