Now showing items 1-9 of 9

    • Çok kullanıcılı çok antenli sistemlerde iş birlikli iletim 

      Yazarel, Y. K.; Aktaş, Defne (IEEE, 2008-04)
      Bu çalışmada işbirlikli, çok kullanıcılı, ve çok antenli bir haberleşme sisteminde telsiz erişim terminallerinin en iyi veri iletimi tekniğine ortaklaşa karar vermeleri problemini inceliyoruz. Burada pek çok çalışmadan ...
    • Large area compatible broadband superabsorber surfaces in the VIS-NIR spectrum utilizing metal-insulator-metal stack and plasmonic nanoparticles 

      Dereshgi, S. A.; Okyay, Ali Kemal (OSA - The Optical Society, 2016)
      Plasmonically enhanced absorbing structures have been emerging as strong candidates for photovoltaic (PV) devices. We investigate metal-insulator-metal (MIM) structures that are suitable for tuning spectral absorption ...
    • MIMIM photodetectors using plasmonically enhanced MIM absorbers 

      Dereshgi, S. Abedini; Okyay, Ali Kemal (SPIE, 2017)
      We demonstrate super absorbing metal-insulator-metal (MIM) stacks and MIMIM photosensitive devices operating at visible and near-infrared (VIS-NIR) spectrum, where absorbing (top) MIM and photocollecting (bottom) MIM can ...
    • Nanoantenna couplers for metal-insulator-metal waveguide interconnects 

      Onbasli, M.C.; Okyay, Ali Kemal (SPIE, 2010)
      State-of-the-art copper interconnects suffer from increasing spatial power dissipation due to chip downscaling and RC delays reducing operation bandwidth. Wide bandwidth, minimized Ohmic loss, deep sub-wavelength confinement ...
    • Perfectly absorbing ultra thin interference coatings for hydrogen sensing 

      Serhatlioglu, M.; Ayas S.; Bıyıklı, Necmi; Dana, A.; Solmaz, M. E. (OSA - The Optical Society, 2016)
      Here we numerically demonstrate a straightforward method for optical detection of hydrogen gas by means of absorption reduction and colorimetric indication. A perfectly absorbing metal-insulator-metal (MIM) thin film ...
    • Plasmonically enhanced hot electron based photovoltaic device 

      Atar F.B.; Battal, E.; Aygun L.E.; Daglar, B.; Bayındır, Mehmet; Okyay, Ali Kemal (Optical Society of American (OSA), 2013)
      Hot electron photovoltaics is emerging as a candidate for low cost and ultra thin solar cells. Plasmonic means can be utilized to significantly boost device efficiency. We separately form the tunneling metal-insulator-metal ...
    • Semiconductor-less photovoltaic device 

      Atar, Fatih B.; Battal, Enes; Aygun, Levent E.; Dağlar, Bihter; Bayındır, Mehmet; Okyay, Ali Kemal (IEEE, 2013)
      We demonstrate a novel semiconductor-less photovoltaic device and investigate the plasmonic effects on this device structure. The device is made of metal and dielectric layers and the operation is based on hot carrier ...
    • Strong stabilization of MIMO systems with restricted zeros in the unstable region 

      Gündeş, A. Nazlı; Özbay, Hitay (IEEE, 2008-12)
      The strong stabilization problem (i.e., stabilization by a stable feedback controller) is considered for a class of finite dimensional linear, time-invariant, multi-input multioutput plants. It is assumed that the plant ...
    • Visible light nearly perfect absorber: an optimum unit cell arrangement for near absolute polarization insensitivity 

      Ghobadi, Amir; Hajian, Hodjat; Gökbayrak, Murat; Dereshgi, Sina Abedini; Toprak, Ahmet; Butun, Bayram; Özbay, Ekmel (OSA - The Optical Society, 2017)
      In this work, we propose an optimum unit cell arrangement to obtain near absolute polarization insensitivity in a metal-insulator-metal (MIM) based ultra-broadband perfect absorber. Our findings prove that upon utilizing ...