1. School of Electrical and Computer Engineering Electro‐Optics and Photonics Engineering Department Ben‐Gurion University of the Negev Beer‐Sheva 8410501 Israel
2. Department of Materials Science and Engineering Tel Aviv University Ramat Aviv 6997801 Israel
3. A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel University Philadelphia PA 19104 USA