[1] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA
[2] Cornell Univ, Kavli Inst Cornell, Ithaca, NY 14853 USA
[3] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083 Campinas, Brazil