1. Department of Mechanical Engineering & Material Science, Rice University, Houston, Texas 77005, United States
2. Department of Physics, Cochin University of Science and Technology, Kochi-682022, India
3. School of Physics, Indian Institute of Science Education and Research, Thiruvananthapuram-695016, India
4. Department of Biomedical Engineering, University of Bridgeport, Bridgeport, Connecticut 06604, United States
5. Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
6. Air Force Research Laboratory, 2941 Hobson Way, Wright-Patterson Air Force Base, Dayton, Ohio 45433-7750, United States