1 Department of Materials Science & Engineering, University of Maryland, College Park MD, USA
2 Institute for Research in Electronics and Applied Physics, University of Maryland, College Park MD, USA
3 Research Center for Intelligent Optoelectronic Computing, Zhejiang Lab, 311121 Hangzhou, China
4 Department of Materials Science & Engineering, Massachusetts Institute of Technology, Cambridge MA, USA
5 Lincoln Laboratory, Massachusetts Institute of Technology, Lexington MA, USA
6 The College of Optics & Photonics, CREOL, University of Central Florida, Orlando FL, USA
7 Department of Materials Science and Engineering, University of Central Florida, Orlando FL, USA
8 Materials Research Laboratory, Massachusetts Institute of Technology, Cambridge MA, USA