1. Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
2. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
3. Center for Studies in Physics and Biology, The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA
4. Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, Florida 32312, USA