[1] Georgia State Univ, Ctr Nanoopt CeNO, Atlanta, GA 30303 USA
[2] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA
[3] Hildegard Jadamowitz Str 26, D-10243 Berlin, Germany
[4] Univ Southern Denmark, Ctr Nano Opt, Campusvej 55, DK-5230 Odense M, Denmark
[5] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA
[6] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA
[7] Vanderbilt Univ, Dept Elect Engn & Comp Sci, 221 Kirkland Hall, Nashville, TN 37235 USA
[8] Vanderbilt Univ, Vanderbilt Inst Nanoscale Sci & Engn, 221 Kirkland Hall, Nashville, TN 37235 USA
[9] Virginia Commonwealth Univ, Dept Elect & Comp Engn, Richmond, VA USA
[10] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[11] Univ Southampton, Ctr Photon Metamat, Southampton SO17 1BJ, Hants, England
[12] Nanyang Technol Univ, Ctr Disrupt Photon Technol, Sch Phys & Math Sci, Singapore 637371, Singapore
[13] Carl von Ossietzky Univ Oldenburg, Inst Phys, D-26129 Oldenburg, Germany
[14] Carl von Ossietzky Univ Oldenburg, Ctr Interface Sci, D-26129 Oldenburg, Germany
[15] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
[16] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
[17] Univ Basque Country, Ctr Phys Mat, CSIC, San Sebastian 20018, Spain
[18] DIPC, San Sebastian 20018, Spain
[19] Basque Fdn Sci, Ikerbasque, Maria Diaz de Haro 3, Bilbao 48013, Spain
[20] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA
[21] Northwestern Univ, Grad Program Appl Phys, Evanston, IL 60208 USA
[22] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
[23] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA
[24] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Castelldefels 08860, Barcelona, Spain
[25] ICREA, Barcelona 08010, Spain
[26] Ludwig Maximilians Univ Munchen, Dept Phys, D-85748 Garching, Germany
[27] Max Planck Inst Quantum Opt, D-85748 Garching, Germany