BİLKENT UNIVERSITY NANOTECHNOLOGY RESEARCH CENTER

PUBLICATIONS

22 - S B Lisesivdin, S Demirezen, M D Caliskan, A Yildiz, M Kasap, S Ozcelik and E Ozbay “Growth Parameter Investigation of Al0.25Ga0.75N/GaN/AlN Heterostructures With Hall Effect Measurements”Semiconductor Science and Technology vol. 23, 095008 (2008) (pdf)

21 - Zhaofeng Li, Koray Aydin and Ekmel Ozbay “Wide Bandwidth Directional Beaming Via Waveguide Ports in Photonic Crystals” Journal of Physics D: Applied Physics vol.41, 155115 (2008). (pdf)

20 - Engin Arslan, Mustafa K Ozturk , Ali Teke , Suleyman Ozcelik and Ekmel Ozbay “Buffer Optimization for Crack-Free GaN Epitaxial Layers Grown on Si(111) Substrate by MOCVD” Journal of Physics D: Applied Physics vol. 41, 155317 (2008). (pdf)

19 - Humeyra Caglayan, Irfan Bulu, Marko Loncar and Ekmel Ozbay “Experimental Observation of Cavity Formation in Composite Metamaterials” Optics Express vol. 16,11132 (2008). (pdf)

18 - Ekmel Ozbay, Zhaofeng Li and Koray Aydin “ Super-Resolution Imaging by One-Dimensional, Microwave Left-Handed Metamaterials With an Effective Negative Index,” Journal of Physics: Condensed Matter vol. 20, 304216 (7pp) (2008). (pdf)

17 - Kamil Boratay Alici, and Ekmel Ozbay, “Characterization and tilted response of a fishnet metamaterial operating at 100 GHz,” Journal of Physics D, vol. 41, 135011 (2008). (pdf)

16 - Koray Aydin, Zhaofeng Li, Levent Sahin, and Ekmel Ozbay “Negative Phase Advance in Polarization Independent, Multi-Layer Negative-Index Metamaterials”, Optics Express volume 16, 8835 (2008).(pdf)

15 - Elena Saenz, Kaan Guven, Ekmel Ozbay, Iñigo Ederra, and Ramon Gonzalo “Enhanced Directed Emission From Metamaterial Based Radiation Source,” Applied Physics Letters, vol. 92, 204103 (2008).(pdf)

14 - Engin Arslan, Serkan Butun, S. Bora Lisesivdin, Mehmet Kasap, Suleyman Ozcelik, and Ekmel Ozbay, “The Persistent Photoconductivity Effect in AlGaN/GaN Heterostructures Grown on Sapphire and SiC Substrates”,Journal of Applied Physics 1033, 103701 (2008). (pdf)

13 - S. Corekci, D. Usanmaz, Z. Tekeli, M. Cakmak, S. Ozcelik, and E. Ozbay, “Surface Morphology of Al0.3Ga0.7N/Al2O3-High Electron Mobility Transistor Structure”, Journal of Nanoscience and Nanotechnology, vol. 8, 640-644 (2008). (pdf)

12 - B. Butun, K. Aydin, E. Ulker, S. Cheylan, G. Badenes, M. Forster, U. Scherf and Ekmel Ozbay, " A Hybrid Light Source With Integrated Inorganic Light-Emitting Diode and Organic Polymer Distributed Feedback Grating", Nanotechnology vol. 19, 95202 (2008). (pdf)

11 - Ekmel Ozbay and K. Aydin, " Negative Refraction and Imaging Beyond the Diffraction Limit by a Two-Dimensional Left-Handed Metamaterial", Photonics and Nanostructures – Fundamentals and Applications vol. 6, 108–115 (2008). (pdf)

10 - K. Aydin, Z. Li, S. Bilge and Ekmel Ozbay, " Experimental and Numerical Study of Omega Type Bianisotropic Metamaterials Combined with a Negative Permittivity Medium", Photonics and Nanostructures – Fundamentals and Applications vol. 6, 116–121 (2008). (pdf)

9 - K. B. Alici and Ekmel Ozbay, " A Planar Metamaterial: Polarization Independent Fishnet Structure", Photonics and Nanostructures – Fundamentals and Applications vol. 6, 102–107 (2008). (pdf)

8 - Y. Zhang, M. Yang, N. G. Portney, D. Cui, G. Budak, E. Ozbay, M. Ozkan, C. S. Ozkan " Zeta Potential : A Surface Electrical Characteristic to Probe the Interaction of Nanoparticles with Normal and Cancer Human Breast Epithelial Cells", Biomed Microdevices vol.10, 10:321–328 (2008). (pdf)

7 - T. Tut, T. Yelboga, E. Ulker and Ekmel Ozbay, " Solar-Blind AlGaN-Based P-I-N Photodetectors with High Breakdown Voltage and Detectivity", Applied Physics Letters, volume 92, 103502 (2008). (pdf)

6 - H. Caglayan, I. Bulu and Ekmel Ozbay, " Off-Axis Directional Beaming Via Photonic Crystal Surface Modes", Applied Physics Letters, volume 92, 092114 (2008). (pdf)

5 - H. Caglayan, I. Bulu and Ekmel Ozbay, " Focusing Surface Plasmons ia changingVia the Incident Angle", Journal Of Applied Physics vol. 103, 053105 (2008). (pdf)

4 - Z. Li, H. Caglayan, E. Colak and Ekmel Ozbay, " Enhanced Transmission and Directivity From Metallic Subwavelength Apertures with Nonuniform and Nonperiodic Grooves", Applied Physics Letters, volume 92, 011128 (2008). (pdf)

                                       3 - S. B. Lisesivdin, E. Arslan, M. Kasap, S .Ozcelik and E .Ozbay, “Self-Consistent Scattering Analysis of the                                             AlGaN/AlN/GaN/AlN Heterostructures Grown on 6H-SiC Substrates Using Photo-Hall Effect Measurements”, Journal of                                             Physics: Condensed Matter, volume 20, 045208 (2008). (pdf)

                                       2 - Bayram Butun, Turgut Tut, Erkin Ulker, Tolga Yelboga, and Ekmel Ozbay, “High-Performance Visible-Blind GaN-Based                                              P-I-N Photodetectors”,   Applied Physics Letters vol. 92, 033507 (2008) (pdf)

                                       1 - S. Acar, S.B. Lisesivdin, M. Kasap, S. Ozcelik, E. Ozbay; “Determination of Two Dimensional Electron and Hole Gas                                              Carriers in AlGaN/GaN/AlN Heterostructures Grown by Metal Organic Chemical Vapor Deposition”; Thin Solid Films                                              516, 2041–2044, (2008).(pdf)

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