1. School of Physics and School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
2. Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine and Children’s Healthcare of Atlanta, Atlanta, Georgia 30322, United States
3. MIT Media Lab, Massachusetts Institute of Technology, Boston, Massachusetts 02139, United States
4. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
5. Laboratoire international associé CNRS-UIUC, UMR 7019, Université de Lorraine, B.P.
70239, 54506 Vandæuvre-lès-Nancy, France