Browsing Fizik by Author "İnci, Naci."

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  • 3 - D optical profilometry at micron scale with modified fiber optic Lloyd's mirror technique 
    İnanç, Arda. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis, it is shown that a modified fiber optic Lloyd’s mirror technique is suitable and practical to produce fringe patterns that have easily adjustable frequency. This allows measuring 3D height distribution of ...
  • 3D optical profilometry using fiber optics lloyd's mirror method 
    Köseoğlu, Gülşen. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    A ber optic Lloyd's mirror assembly is investigated to obtain various optical interference patterns for the detection of three-dimensional shapes of rigid bodies. Two types of the ber optic Lloyds systems are used in ...
  • 3D optical profilometry with a double beam - splitter setup 
    Çetin, İsra Merve. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    In this thesis, it is demonstrated that a double beam splitter arrangement is very convenient and more practical to generate square shaped fringe patterns, and fringe distribution can be easily controlled in two dimensions. ...
  • An interferometric vibration sensor based on a four - core optical fiber 
    Gökbulut, Belkıs. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    In this thesis, an interferometric fiber optic vibration sensor based on a four-core optical fiber is described. When the light is coupled into the four cores, each core acts as a mutually coherent waveguide with the other ...
  • Coherence and wavelength effects on the growth mechanism of porous silicon nano-structures 
    Saygılı, Aslı Çakır. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In this study, the objective is first to produce regular porous silicon(PS) nanostructures and then to observe the effects of wavelength and coherence length of the light, which is used for illumination, on the growth ...
  • Determination of optical constants of thin films 
    Yıldız, Ali. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1998., 1998.)
    In this thesis, a new approach is explored to determine the optical constants of thin dielectric layers. This study is based on the measurement of the reflection at various angles to determine the optical constants of a ...
  • Fibre optic wedge type cavity random laser 
    Yartaşı, Ekrem. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    In this work, a fibre optic wedge type cavity, with arbitrarily distributed scattering centres, is employed to construct a flexible, cost effective and low threshold random laser. The wedge cavity is obtained through the ...
  • Fluorescence dynamics of bodipy molecules on ito thin film 
    Yartaşı, Ekrem. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Fluorescence dynamics of bodipy dye molecules deposited on Indium Tin Oxide (ITO) thin films is studied in this thesis. Bodipy molecules deposited on ITO thin films of different thicknesses and resistivities are analyzed ...
  • Fluorescence dynamics of dye-dye and dye-nanostructures interactions 
    Açıkgöz, Sabriye. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    The decay dynamics of (Boradiazaindacene) BODIPY dye molecules embedded in Porous silicon (PSi) nanostructures produced by electrochemical anodization of p-type silicon wafers in an HF solution are investigated using ...
  • Fluorescence lifetime images of dye molecules 
    Altundal, Yücel. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In this thesis, Fluorescence Lifetime Images of perylene and bodipy dye molecules mixture are studied using a time-correlated single photon-counting technique. Lifetimes of dye molecules are calculated pixel-by-pixel from ...
  • Laser assisted growth of silicon nano-structures 
    Demirbaş, Elif. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    In this study, the aim is to produce homogeneous porous silicon(PS) nanostructures and then to observe the effect of resistivity of starting silicon samples. P-type silicon wafers with di erent resistivity are prepared by ...
  • Light-matter interaction in photonic cavities 
    Gökbulut, Belkıs. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    In this thesis, light‒matter interaction in several novel photonic platforms are investigated by time-resolved fluorescence lifetime measurements along with their theoretical and numerical analyses. Firstly, a simple ...
  • Measurement of heat, strain, and refractive index with multicore optical fibers 
    Güvenç Kılıç, Sema. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    In this thesis, different types of multicore optical fibers are designed and employed in the optical sensing experimental setups to investigate their detection abilities of temperature, heat transfer rate, strain, and ...
  • Measurement of physical and optical properties of thin films with an ellipsometric technique 
    Ertuğrul, Emine. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    In this thesis, working mechanism of ellipsometer is studied in details. Thickness and refractive index of polyethyleneglycol(PEG), gold and silicon dioxide lms are measured using an elipsometer. PEG is attached to a gold ...
  • Near infrared laser beam and silicon water interactions 
    Akşit Kaya, Elif Türkan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    At 1070 nm wavelength, Nanosecond (ns) pulse and Continuous Wavelength (CW) lasers’ ablation of n-type(100) and p-type(111) Si wafer is presented in ambient, water and glycerin environments. Impacts of laser emission mode, ...
  • Plastic fiber optic humidity and gas sensor 
    Açıkgöz, Sabriye. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    In this thesis, a simple and low cost plastic optical fiber (POF) sensor with a humidity sensing range from 13 % to 95 % relative humidity (RH) is described. The sensing mechanism of POF humidity sensor is based on the ...
  • Plastic optical fibers as gas sensors 
    Şanlı, Aydın. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    This thesis is mainly about polyethylene glycol (PEG) coated simple optical fibers and their use as gas sensors. In this study, a simple plastic optical fiber is coated with gamma-isocyanatopropyltriethoxysilane end-capped ...
  • Purcell effect in polymer films 
    Sarpkaya, İbrahim. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    In this thesis, the Purcell effect in polymer thin films is studied. According to the Purcell effect, fluorescence of an atom or molecule can be enhanced or inhibited when it is confined to microcavity. As an application ...

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