1. Faculty of Engineering and Natural Science, Sabanci University, 34956 Istanbul, Turkey
2. Istanbul Medipol University, School of Engineering and Natural Sciences, Istanbul, 34810, Turkey
3. Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
4. Nanosolar Plasmonics, Ltd., Kocaeli, 41400, Turkey
5. Sabanci University Nanotechnology Research and Application Center, Tuzla, Istanbul 34956, Turkey
6. Department of Physics and Astronomy, University of Sheffield, Western Bank, Sheffield S10 2TN, U.K.