Now showing items 1-10 of 10

    • Femtosecond laser written waveguides deep inside silicon 

      Pavlov, I.; Tokel, O.; Pavlova, S.; Kadan, V.; Makey, G.; Turnalı, A.; Yavuz, Ö.; Ilday, F. Ö. (Optical Society of America, 2017)
      Photonic devices that can guide, transfer, or modulate light are highly desired in electronics and integrated silicon (Si) photonics. Here, we demonstrate for the first time, to the best of our knowledge, the creation of ...
    • High-efficiency and low-loss gallium nitride dielectric metasurfaces for nanophotonics at visible wavelengths 

      Emani, N. K.; Khaidarov, E.; Paniagua-Domínguez, R.; Fu, Y. H.; Valuckas, V.; Lu S.; Zhang X.; Tan S.T.; Demir, H. V.; Kuznetsov, A. I. (American Institute of Physics Inc., 2017)
      The dielectric nanophotonics research community is currently exploring transparent material platforms (e.g., TiO2, Si3N4, and GaP) to realize compact high efficiency optical devices at visible wavelengths. Efficient ...
    • Highly directive radiation and negative refraction using photonic crystals 

      Ozbay, E.; Bulu, I.; Aydin, K.; Caglayan H.; Alici, K. B.; Guven, K. (Institute of Physics Publishing, 2005)
      In this article, we present an experimental and numerical study of certain optical properties of two-dimensional dielectric photonic crystals (PCs). By modifying the band structure of a two-dimensional photonic crystal ...
    • In-chip microstructures and photonic devices fabricated by nonlinear laser lithography deep inside silicon 

      Tokel, O.; Turnalı, A.; Makey, G.; Elahi, P.; Çolakoǧlu, T.; Ergeçen E.; Yavuz, Ö.; Hübner R.; Borra, M. Z.; Pavlov, I.; Bek, A.; Turan, R.; Kesim, D. K.; Tozburun, S.; Ilday, S.; Ilday, F. Ö. (Nature Publishing Group, 2017)
      Silicon is an excellent material for microelectronics and integrated photonics 1-3, with untapped potential for mid-infrared optics 4 . Despite broad recognition of the importance of the third dimension 5,6, current ...
    • MIMIM photodetectors using plasmonically enhanced MIM absorbers 

      Abedini Dereshgi, S.; Okyay, A. K. (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 ...
    • Photonic devices and systems embedded with nanocyrstals 

      Demir, H. V.; Soganci I.M.; Mutlugun, E.; Tek, S.; Huyal I.O. (2006)
      We review our research work on the development of photonic devices and systems embedded with nanocyrstals for new functionality within EU Phoremost Network of Excellence on nanophotonics. Here we report on CdSe/ZnS ...
    • Plasmon and grid resonances in the electromagnetic scattering by finite grids of silver nanowires 

      Natarov, D. M.; Benson, T. M.; Altintas, A.; Sauleau, R.; Nosich, A. I. (2010)
      The problem of the H-polarized wave scattering by finite chains of circular nanowires is considered. A two-dimensional diffraction problem with rigorous boundary conditions is solved by partial separations of variables ...
    • Ultra-low-cost near-infrared photodetectors on silicon 

      Nazirzadeh, M.A.; Atar F.B.; Turgut, B.B.; Okyay, A., K. (SPIE, 2015)
      We demonstrate Silicon-only near-infrared (NIR) photodetectors (sensitive up to 2000 nm) that meet large-scale ultralow-cost fabrication requirements. For the detection of infrared photons, we use metal nanoislands that ...
    • Unraveling the ultralow threshold stimulated emission from CdZnS/ZnS quantum dot and enabling high ‐ Q microlasers 

      Wang Y.; Fong, K. E.; Yang, S.; Ta, V.; Gao, Y.; Wang, Z.; Nalla, V.; Demir, H. V.; Sun, H. (Wiley-VCH Verlag, 2015)
      The newly engineered ternary CdZnS/ZnS colloidal quantum dots (CQDs) are found to exhibit remarkably high photoluminescence quantum yield and excellent optical gain properties. However, the underlying mechanisms, which ...
    • Wafer-scale arrays of high-Q silica optical microcavities 

      Ozgur E.; Huseyinoglu E.; Dana, A. (OSA - The Optical Society, 2017)
      On-chip high-Q microcavities possess significant potential in terms of integration of optical microresonators into functional optoelectronic devices that could be used in various applications, including biosensors, ...