Browsing Dept. of Physics - Ph.D. / Sc.D. by Issue Date
Now showing items 1-20 of 76
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Ballistic transport and tunneling in small systems
(Bilkent University, 1990)Ballistic transport and tunneling of electrons in mesoscopic systems have become one of the most important subjects of condensed matter physics. The quantum point contacts and scanning tunneling microscope form the basic ... -
Electronic structure of low dimensional semiconductor systems
(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 ... -
Superconducting systems of low dimensionality
(Bilkent University, 1992)It is possible to call the last five years as the golden age of superconductivity. The two most important developments in the field are the discovery of copper oxide and fullerene superconductors. In this work, some ... -
Investigation of Si1-xGex alloy formation by using STM
(Bilkent University, 1994) -
Hot electron interactions in nanostructures
(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 ... -
Fabrication and characterization of high-speed, high quantum efficiency, resonant cavity enhanced Schottky photodiodes
(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 ... -
Theory of atomic scale friction
(Bilkent University, 1998)Friction is an old and important but at the same time very complex physical event. This thesis aims to develop an atomic scale theory of friction. VVe investigate various atomic processes and stick-slip motion by using ... -
Quantum statistics of light interacting with matter
(Bilkent University, 1999)Studies on some systems in which light interacts with matter are performed from quantum statistical point of view. As a result of these studies a novel effect which can be utilized for detecting squeezed phonons is ... -
Strongly correlated models of high-temperature superconductivity
(Bilkent University, 1999)Son zamanlarda nanometrc büyüklüğündeki örneklerle ya|)dan tek ek'ktron ta.^ınma deneyleri, üstün iletkenlerin büyüklüklerinin alt sının ile ilgili soruyu yeniden gündeme getirmiştir, iler ne kadar, belirsiz tanecik ... -
Many-body interaction effects in quasi-one-dimensional photo-excited electron-hole systems
(Bilkent University, 1999)The work in this thesis concerns rnany-body interaction effects in a quasi-onedimensional electron-hole plasma, which may be generated under intense photoexcitation in a semiconductor quantum-well wire. In particular, ... -
Physics and applications of photonic crystals
(Bilkent University, 2000)We first fabricated a dielectric based layer-by-layer photonic crystal, with a three-dimensional photonic band gap at microwave frequencies. We investigated the transmission, reflection and defect characteristics of the ... -
Structural and electronic properties of carbon-based materials
(Bilkent University, 2000)In this thesis, some carbon-based materials in nano scale have been investigated by using first-principles methods as well as transferable tight-binding and empirical potential models. The focus of interest has been in ... -
Phonon-mediated electron-electron interaction in confined media: low-dimensional bipolarons
(Bilkent University, 2000) -
Physics and applications of coupled-cavity structures in photonic crystals
(Bilkent University, 2002)We proposed and demonstrated a new type of propagation mechanism for the electromagnetic waves in photonic band gap materials. Photons propagate through coupled cavities due to interaction between the highly localized ... -
Deformation and finite size effects in cooperative molecular motors
(Bilkent University, 2002-07)Motor protein systems have been of considerable interest lately. In these studies muscle contraction is modeled as the sliding of two filaments made of protein particles over one another, that is the sliding of the ... -
High speed and high efficiency infrared photodetectors
(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 ... -
Entanglement in atom-photon systems
(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 ... -
Functionalization of carbon nanotubes
(Bilkent University, 2005) -
Robust entanglement in atomic systems
(Bilkent University, 2005)Various models for generation of robust atomic entangled states and their implementation with current accessible technologies are proposed and worked out. Deterministic creation of long living Bell states with respect ... -
Monolithic and hybrid silicon-on-insulator integrated optical devices
(Bilkent University, 2005)Silicon, the basic material of electronics industry is rediscovered nowadays for its potential use in photonics and integrated optics. The research activity in silicon integrated optics have been speeding up during the ...
