Browsing Dept. of Physics - Master's degree by Title
Now showing items 1-20 of 170
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33 Femtosecond Yb-doped optical frequency comb for frequency metrology applications
(Bilkent University, 2013)Optical frequency combs have enabled many applications (high precision spectroscopy, table-top optical frequency metrology, optical atomic clocks, etc.), received considerable attention and a Nobel Prize. In this thesis, ... -
Ab-initio study of iridium on silicon (001) surface
(Bilkent University, 2013)Self-assembled nanowire growth on semiconductor surface is based on deposing sub-monolayer material over the surface. Even though high resolution STM image gives plausible surface analysis, determination of the nanowire ... -
Adsorption and dissociation of hydrogen molecule on carbon nanotubes
(Bilkent University, 2004)Earlier, it has been suggested that carbon nanotubes can provide high storage capacity and other physical properties suitable for the fuel cell technologies. In this thesis we have investigated adsorption, desorption and ... -
Al(x)Ga(1-x)As/GaAs graded index separate confinement heterostructure single quantum well lasers
(Bilkent University, 1994)"Stimulated emission of photons could be produced in semiconductors by recombination of carriers injected across a p-n junction This idea was first suggested by Basov et al} in 1961. Soon afterwards diode lasers were ... -
Alteration of self-assembled patterns by microorganisms in evaporating droplets
(Bilkent University, 2016-08)The science of self-organization comprises a diverse range of processes where a disordered system of components form ordered pattern or structure spontaneously without any external instruction [1]. Plentiful examples of ... -
AlxGa1-xN based solar blind Schottky photodiodes
(Bilkent University, 2004)Photodetectors are essential components of optoelectronic integrated circuits and fiber optic communication systems. AlxGa1−xN is a promising material for optoelectronics and electronics. Applications include blue and ... -
Analysis of the magnetic translation group and investigation of a one-dimensional topological model
(Bilkent University, 2017-08)The periodicity of a space lattice in presence of a uniform magnetic eld is preserved. During this thesis, we will study a set of modi ed translation operators which commute with the e ective Hamiltonian of an electron ... -
Analytic calculation of ground state properties of the 2d and 3d electron gas
(Bilkent University, 2015-06)The electron gas (2D and 3D) is a model which consists of interacting electrons moving in a uniform positive background. Its importance stems from the fact that a number of metals behave similarly, it provides the ... -
Approximation methods in the polaron theory: applications to low dimensionally confined polarons
(Bilkent University, 1996)The pelaron problem has been of interest in condensed matter physics cind held theory tor cibout half a century. Within the framework of Vcist variety of theoreticcil approximations, the bulk polaron properties have been ... -
Atomic force microscopy experiments on atomically thin materials
(Bilkent University, 2020-06)In 2004, successful isolation of graphene attracted immense attention of scientists because of atomic scale thickness and exotic functionalities. Regardless of graphene’s thickness and extraordinary properties only reason ... -
Atomic scale investigation of clean and epi-grown Si(001) surfaces using scanning tunneling microscopy
(Bilkent University, 1996)In this thesis, clean and epi-grown Si(001)(2x1)surfaces are analyzed by Scanning Tunneling Microscopy (STM). The STM and Ultra High Vacuum System (UHV) in which the microscope is installed, are described. A brief history ... -
Atomic theory of the scanning tunneling microscope
(Bilkent University, 1988)The Scanning Tunneling Microscope is proven to be one of the most powerful tools for surface structure determination. Present theories are able to explain the operation of the microscope when the tip is far from the ... -
Atomic, electronic, and transport properties of quantum point contacts on graphite surface
(Bilkent University, 1997) -
Bias voltage control of a molecular spin valve
(Bilkent University, 2009)With the discovery of giant magneto resistance a new field called spintronics is emerged. Utilizing spin-degree of freedom of the electron as well as its charge, high-speed devices which consumes low energy can be designed. ... -
Bio-inpired all-polymer 2d photonic crystal fibers = Doğadan esinlenilmiş tamamen polimer 2B fotonik kristal fiberleri
(Bilkent University, 2014)Photonic crystals are essential part of the integrated systems which require manipulation of light in a manner that all-optical polarization and re ection properties are completely calibrated to necessary levels. However, ... -
Braph : a toolbox developed for brain graph analysis of various imaging modalities
(Bilkent University, 2017-03)Complex systems, like the human brain, are composed of a huge number of interacting elements showing complex patterns. Graph theory provides a mathematical toolbox for investigating the role of each element in these systems. ... -
Calculation of masses of dark solitons in 1D Bose-Einstein condensates using Gelfand Yaglom method
(Bilkent University, 2016-11)Nonlinear excitations of Bose-Einstein condensates (BEC) play important role in understanding the dynamics of BECs. Solitons, shape preserving wave packets, are the most fundamental nonlinear excitations of BECs. They ... -
Characterization of photonic crystals at microwave frequencies
(Bilkent University, 1996)VVe investigated the surface reflection properties of layer-by-layer photonic crystals, for dielectric and metallic based photonic crystals. By using a FabryPerot cavity analogy with the reflection-phase information of ... -
Computational study of excitons and biexcitons in semiconductor core/shell nanocrystals of type I and type II
(Bilkent University, 2013)In this thesis, we studied electronic structure and optical properties of Type-I, Type-II, and quasi Type-II semiconductor nanocrystals (also known as colloidal quantum dots). For a parametric study, we developed quantum ... -
Construction of a scanning tunneling microscope and first results
(Bilkent University, 1990)In this thesis, construction of a Scanning Tunneling Microscope in air is explained. A step motor sample approach mechanism and a tripod scanner are used in the construction. Atomic resolution images of graphite samples ...
