1. Electrooptical Engineering Unit , Ben-Gurion University of the Negev, David Ben Gurion Blvd, P.O. Box 653, Beer-Sheva 8410501, Israel
2. Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, David Ben Gurion Blvd, P.O. Box 653, Beer-Sheva 8410501, Israel
3. Center for Quantum Information Science and Technology, Ben-Gurion University of the Negev, David Ben Gurion Blvd, P.O. Box 653, Beer-Sheva 8410501, Israel