Now showing items 1-17 of 17

    • 50 nm Hall Sensors for Room Temperature Scanning Hall Probe Microscopy 

      Sandhu, A.; Kurosawa, K.; Dede, M.; Oral, A. (Institute of Physics Publishing, 2004)
      Bismuth nano-Hall sensors with dimensions ∼50nm × 50 nm were fabricated using a combination of optical lithography and focused ion beam milling. The Hall coefficient, series resistance and optimum magnetic field sensitivity ...
    • Color holographic reconstruction using multiple SLMs and LED illumination 

      Yaraş, Fahri; Onural, Levent (SPIE, 2009-01)
      A color holographic reconstruction technique by using three light emitting diodes (LEDs) is described. Reflective type phase-only spatial light modulators (SLMs) are used since they are suitable for in-line phase holograms. ...
    • Doppler effect on nanopatterning with nonlinear laser lithography 

      Yavuz, Özgün; Kara, Semih; Tokel, Onur; Pavlov, Ihor; İlday, Fatih Ömer (OSA, 2017)
      Summary form only given. Just five years after invention of the laser, laser induced periodic structures (LIPSS) had been reported. However, the structure period is not very uniform in LIPSS. Recently, with nonlinear laser ...
    • Fabrication of 100 nm pMOSFETS With Hybrid AFW / STM lithography 

      Soh, H. T.; Wilder, K.; Atalar, Abdullah; Quate, C. F. (IEEE, 1997-06)
      Scanning probe lithography (SPL) is an emerging area of research in which the scanning tunneling microscope (STM) or atomic force microscope (AFM) is used to pattern nanometer-scale features. Four factors will dictate ...
    • Fabrication of polymer micro needles for transdermal drug delivery system using DLP based projection stereo-lithography 

      Ali, Z.; Türeyen, E. Buğra; Karpat, Yiğit; Çakmakcı, Melih (Elsevier, 2016)
      Fabrication of micro needles, which reduce pain during insertion and lessen tissue injury, has recently attracted great interest. Different manufacturing systems have been utilized for the advancement of micro needles such ...
    • Filtering characteristics of hybrid integrated polymer and compound semiconductor waveguides 

      Ozturk, C.; Huntington, A.; Aydınlı, Atilla; Byun, Y.T.; Dagli, N. (IEEE, 2002)
      This paper reports a study on a compact filter fabricated using hybrid integration of compound semiconductors and polymers. A GaAs epilayer is glued onto a polymer channel waveguide forming a highly asymmetrical directional ...
    • Highly polarized light emission by isotropic quantum dots integrated with magnetically aligned segmented nanowires 

      Uran, C.; Erdem, T.; Guzelturk, B.; Perkgöz, N. K.; Jun, S.; Jang, E.; Demir, Hilmi Volkan (American Institute of Physics, 2014)
      In this work, we demonstrate a proof-of-concept system for generating highly polarized light from colloidal quantum dots (QDs) coupled with magnetically aligned segmented Au/Ni/Au nanowires (NWs). Optical characterizations ...
    • Holograms deep inside Silicon 

      Makey, Ghaith; Tokel, Onur; Turnalı, Ahmet; Pavlov, Ihor; Elahi, Parviz; Yavuz, Ozg ¨ un; İlday, F. Ömer (Optical Society of America, 2016)
      Through the Nonlinear Laser Lithography method, we demonstrate the first computer generated holograms fabricated deep inside Silicon. Fourier and Fresnel holograms are fabricated buried inside Si wafers, and a generation ...
    • 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 ...
    • Investigation of the effect of thermal cycling on the device performance of YBa2Cu3O7-δ DC-SQUIDs 

      Avci I.; Algul, B.P.; Bozbey, A.; Akram, R.; Tepe, M.; Abukay, D. (2007)
      We investigated the effect of thermal cycling on the operational performance of YBa2Cu3O7-δ (YBCO) direct current superconducting quantum interference devices (DC-SQUIDs) fabricated onto 24°SrTiO3 (STO) bicrystal substrates. ...
    • Laser-slicing of silicon with 3D nonlinear laser lithography 

      Tokel, Onur; Turnalı, Ahmet; Çolakoğlu, T.; İlday, Serim; Borra, M. Z.; Pavlov, Ihor; Bek, A.; Turan, R.; İlday, Fatih Ömer (OSA, 2017)
      Recently, we have showed a direct laser writing method that exploits nonlinear interactions to form subsurface modifications in silicon. Here, we use the technique to demonstrate laser-slicing of silicon and its applications.
    • Method to enlarge the hologram viewing window using a mirror module 

      Kang H.; Ohmura, N.; Yamaguchi, T.; Yoshikawa H.; Kim, S.-C.; Kim, E.-S. (2009)
      A liquid crystal panel for a video projector is often used for holographic television. However, its pixel size and pixel number are not enough for practical holographic 3-D display. Therefore, a multipanel configuration ...
    • Nonlinear laser lithography for enhanced tribological properties 

      Gnilitskyi, I.; Pavlov, Ihor; Rotundo, F.; Orazi, L.; Martini, C.; İlday, Fatih Ömer (IEEE, 2015-05)
      This paper investigates a new field for application of femtosecond laser-induced periodic surface structures (LIPSS). We designed an innovative solution to reduce coefficient of friction of mechanical parts by using the ...
    • Reconfigurable nested ring-split ring transmitarray unit cell employing the element rotation method by microfluidics 

      Erdil, E.; Topalli, K.; Esmaeilzad, N. S.; Zorlu, O.; Kulah, H.; Aydin, C. O. (Institute of Electrical and Electronics Engineers, 2015)
      A continuously tunable, circularly polarized X-band microfluidic transmitarray unit cell employing the element rotation method is designed and fabricated. The unit cell comprises a double layer nested ring-split ring ...
    • Scaling of diffractive and refractive lenses for optical computing and interconnections 

      Özaktaş, Haldun M.; Urey, H.; Lohmann, A. W. (Optical Society of America, 1994-06-10)
      We discuss both numerically and analytically how the space-bandwidth product and the information density of lenses scale as functions of their diameter and f-number over many orders of magnitude. This information may be ...
    • Spectroscopic investigation of polyvinyl chloride photodegradation in blends with basic traps 

      Birer, Özgür (Bilkent University, 1999)
      Polyvinyl chloride degrades via loss of HCI when it is exposed to heat, energetic particles or photons. The mechanism is known as the zip mechanism and results in conjugated segments, polyenes. Degradation also leads to ...
    • Ultra-low-cost near-infrared photodetectors on silicon 

      Nazirzadeh, M. Amin; Atar, Fatih B.; Turgut, B. Berkan; Okyay, Ali Kemal (SPIE, 2015-02)
      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 ...