Now showing items 15-34 of 72

    • Electro-magnetic properties and phononic energy dissipation in graphene based structures 

      Sevinçli, Haldun (Bilkent University, 2008)
      With the synthesis of a single atomic plane of graphite, namely graphene honeycomb structure, active research has been focused on the massless Dirac fermion behavior and related artifacts of the electronic bands crossing ...
    • Electronic structure of graphene under the influence of external fields 

      İslamoğlu, Selcen (Bilkent University, 2012)
      In this thesis, the electronic structure of graphene under the influence of external fields such as strain or magnetic fields is investigated by using tight-binding method. Firstly, we study graphene for a band gap opening ...
    • Electronic structure of low dimensional semiconductor systems 

      Gülseren, Oğuz (Bilkent University, 1992)
      Recent progress made in the growth techniques has led to the fabrication of the artificial semiconductor systems of lower dimension. Electrons and holes in these materials have quantization different from those of the ...
    • Entanglement : quantification via uncertainties and search among ultracold bosons in optical lattices 

      Öztop, Barış (Bilkent University, 2009)
      In the first part of the Thesis, the known measures of entanglement for finite dimensional systems are reviewed. Both the simplest case of pure states that belong to bipartite systems and more general case of mixed states ...
    • Entanglement in atom-photon systems 

      Can, Muhammet Ali (Bilkent University, 2004)
      In this work we propose a new principle from the point of view of quantum fluctuations of observables. This new principle can be considered as an operational definition of ME states. Moreover, we show the existence of ...
    • Entanglement in local systems 

      Binicioğlu Çetiner, Sinem (Bilkent University, 2008)
      In this study, we first discuss entanglement measures and we introduce a way to construct generic entangled states of an n-level quantum system. Then we discuss entanglement as a local object. Particularly we use a ...
    • Exciton condensate driven force in double layer systems 

      Özgün, Ege (Bilkent University, 2016-02)
      Excitonic systems are challenging to deal with both theoretically and experimentally but in return, they offer a very rich physics and exotic features. We will investigate their properties under weak magnetic field and ...
    • Exciton harvesting systems of nanocrystals 

      Mutlugün, Evren (Bilkent University, 2011)
      Semiconductor nanocrystals, also known as colloidal quantum dots, have gained substantial scientific interest for innovative light harvesting applications including those in biolabeling. Organic dyes and fluorescent ...
    • Fabrication and characterization of high-speed, high quantum efficiency, resonant cavity enhanced Schottky photodiodes 

      Ata, Erhan Polatkan (Bilkent University, 1998)
      Rapidly developing “photonics” technology promises higher bcindwidths of communiccition than any other techniciue did ever. The increasing rate of communication not only alters science and technology, but brings a global ...
    • First-principles investigation of graphitic nanostructures 

      Şen, Hüseyin Şener (Bilkent University, 2013)
      In this thesis, first-principles investigations of several graphene related nanosystems based on density functional theory are presented. First, the electronic structure of several graphene nano-ribbons both in 1D and ...
    • Functionalization of carbon nanotubes 

      Dağ, Sefa (Bilkent University, 2005)
    • GaN/AlGaN-based UV photodetectors with performances exceeding the PMTS 

      Tut, Turgut (Bilkent University, 2008)
      The recent developments in high Al-content AlxGa1−xN material growth technology made it possible to fabricate high performance solar-blind photodetectors operating in the ultraviolet (UV) spectral region with improved receiver ...
    • Graphene based optoelectronics in the visible spectrum 

      Polat, Emre Ozan (Bilkent University, 2015)
      Graphene, a two dimensional crystal of carbon atoms, emerges as a viable material for optoelectronics because of its electrically-tunable broadband optical properties. Optical response of graphene at visible and near ...
    • Graphene-based electrically tunable terahertz optoelectronics 

      Kakenov, Nurbek (Bilkent University, 2016-11)
      Advances in terahertz (THz) research and technology, has bridged the gap between radio-frequency electronics and optics. More efficient control of THz waves would highly benefit noninvasive, high-resolution imaging ...
    • Ground-state properties of ultra-cold atomic gases 

      Sevinçli, Sevilay (Bilkent University, 2008)
      After the observation of Bose-Einstein condensation, the developments in the experimental control and measurement methods provided the realization of basic models of many-body physics using dilute, ultra-cold gases. This ...
    • High speed and high efficiency infrared photodetectors 

      Kimukin, İbrahim (Bilkent University, 2004)
      The increasing demand for telecommunication systems resulted in production of high performance components. Photodetectors are essential components of optoelectronic integrated circuits and fiber optic communication ...
    • Hot electron interactions in nanostructures 

      Kaya, Ismet Inonu (Bilkent University, 1997)
      Modern semiconductor growth and processing techiques have provided the capability of fabricating a huge variety of devices which have atomically precise layered structures and lateral patterns with nanometer sizes. This ...
    • Intracavity optical trapping with fiber laser 

      Kalantarifard, Fatemeh (Bilkent University, 2019-06)
      After Ashkin's seminal works, optical trapping has been a powerful technique for capturing and manipulating sub micro particles not only in physics research fields but also in biology and photonics. Standard optical ...
    • Investigation of lateral forces in dynamic mode using combined AFM/STM 

      Atabak, Mehrdad (Bilkent University, 2007)
      In this Ph.D. work, we constructed a ¯ber optic interferometer based non-contact Atomic Force Microscope (nc-AFM) combined with Scanning Tunneling Micro- scope(STM) to study lateral force interactions on Si(111)-(77) ...
    • Investigation of Si1-xGex alloy formation by using STM 

      Oral, Ahmet (Bilkent University, 1994)