Now showing items 1-7 of 7

    • Concentric ring structures as efficient SERS substrates 

      Cinel, N. A.; Cakmakyapan, S.; Ertas, G.; Özbay, Ekmel (Institute of Electrical and Electronics Engineers, 2013)
      Plasmonic nanopatterned structures that can work as highly efficient surface-enhanced Raman scattering (SERS) substrates are presented in this study. A 'coupled' concentric ring structure has been designed, fabricated, ...
    • E-Beam lithography designed substrates for surface enhanced Raman spectroscopy 

      Cinel, N. A.; Cakmakyapan, S.; Butun, S.; Ertas, G.; Özbay, Ekmel (Elsevier BV, 2015-06)
      Surface Enhanced Raman Spectroscopy (SERS) is a popular method that amplifies weak Raman signals from Raman-active analyte molecules making use of certain specially-prepared metallic surfaces. The main challenge in SERS ...
    • Electron beam lithography designed silver nano-disks used as label free nano-biosensors based on localized surface plasmon resonance 

      Cinel, N. A.; Butun, S.; Özbay, Ekmel (Optical Society of America, 2012-01-20)
      We present a label-free, optical nano-biosensor based on the Localized Surface Plasmon Resonance (LSPR) that is observed at the metaldielectric interface of silver nano-disk arrays located periodically on a sapphire substrate ...
    • 'Fairy Chimney'-Shaped Tandem Metamaterials as Double Resonance SERS Substrates 

      Cinel, N. A.; Butun, S.; Ertas, G.; Özbay, Ekmel (Wiley-VCH Verlag, 2012-10-12)
      A highly tunable design for obtaining double resonance substrates to be used in surface-enhanced Raman spectroscopy is proposed. Tandem truncated nanocones composed of Au-SiO2-Au layers are designed, simulated and fabricated ...
    • LSPR enhanced MSM UV photodetectors 

      Butun, S.; Cinel, N. A.; Özbay, Ekmel (IOP Publishing, 2012-10-18)
      We fabricated localized surface plasmon resonance enhanced UV photodetectors on MOCVD grown semi-insulating GaN. Plasmonic resonance in the UV region was attained using 36nm diameter Al nanoparticles. Extinction spectra ...
    • Nanoantenna coupled UV subwavelength photodtectors based on GaN 

      Butun, S.; Cinel, N. A.; Özbay, Ekmel (Optical Society of America, 2012)
      The integration of nano structures with opto-electronic devices has many potential applications. It allows the coupling of more light into or out of the device while decreasing the size of the device itself. Such devices ...
    • SiC substrate effects on electron transport in the epitaxial graphene layer 

      Arslan, E.; Çakmakyapan S.; Kazar, Ö.; Bütün, S.; Lişesivdin, S. B.; Cinel, N. A.; Ertaş, G.; Ardalı, Ş.; Tıraş, E.; Jawad-ul-Hassan,; Özbay, Ekmel; Janzén, E. (Springer, 2014)
      Hall effect measurements on epitaxial graphene (EG) on SiC substrate have been carried out as a function of temperature. The mobility and concentration of electrons within the two-dimensional electron gas (2DEG) at the EG ...