1. Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India
2. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
3. Nick Holonyak Jr., Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA
4. Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA