1. Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, United States
2. Department of Engineering and Computer Science, Seattle Pacific University, Seattle, Washington 98119, United States
3. College of Physics, Chongqing University, Chongqing 400032, China
4. School of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350014, China
5. Department of Engineering Physics, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
6. Department of Mechanical Engineering, City College of City University of New York, New York 10031, United States