Browsing Dept. of Physics - Master's degree by Title
Now showing items 31-50 of 170
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Electronic and atomic processes in nanowires
(Bilkent University, 1996)The variation of conductance of a nanowire which is pulled between two metal electrodes has been the subject of dispute. Recent experimental set-ups using a combination of STM and AFM show that changes in conductivity ... -
Electronic structure of graphene nano-ribbons
(Bilkent University, 2008)Graphite is a known material to human kind for centuries as the lead of a pencil. Graphene as a two dimensional material, is the single layer of graphite. Many theoretical works have been done about it so far, however, ... -
Electronic structure of Si/Ge semiconductor superlattices
(Bilkent University, 1988)A brief review about the two dimensional electron systems and especially band offsets is given. The electronic properties of the Si„/Ge„(001) strained superlattices as a function of the superlattice periodicity and the ... -
Electrostatic correlations in inhomogeneous electrolytes
(Bilkent University, 2018-07)The field-theoretic approach is used to obtain the self-consistent equations for inhomogeneuos symmetric electrolytes. The perturbative Green's function method is used to solve these self-consistent equations for an ... -
Electrostatics of polymer translocation through membrane nanopores in electrolyte solutions
(Bilkent University, 2021-02)The transport of polymers across membranes in electrolyte solutions happens in most biological systems and is necessary for cells to function. Moreover, the poly-mer translocation process has proven to be very important ... -
Energy and angular momentum transfer with circular Rydberg states
(Bilkent University, 2017-08)Circular states belong to a class of Rydberg states having maximum angular momentum. These states, compared to other Rydberg states, have longer lifetimes, and in the classical limit resemble circular Bohr-like orbits. ... -
Enhanced confined microwave transmission by single subwavelength apertures
(Bilkent University, 2005)Grating-coupling phenomena between surface plasmons and electromagnetic waves are studied in the microwave spectrum using metallic circular apertures surrounded by an array of grooves. The measurements are performed in ... -
Evolution of the hofstadter butterfly in a tunable optical lattice
(Bilkent University, 2015-08)There are a limited number of exact solutions for quantum mechanical systems. It is critical to obtain solutions for complex systems. One of these unsolved equations was the famous Harpers equation, which was proposed ... -
Extended phase diagram of ASEP with two types of particles
(Bilkent University, 2010)The ASEP (Asymmetric Simple Exclusion Process) model system with two types of particles is studied. The system is interesting because it exhibits spontaneous symmetry breaking when parameters controlling the dynamics of ... -
Extensions of one-dimensional topological insulator models and their properties
(Bilkent University, 2021-04)We mainly study the SSH model, a one dimensional topological insulator. As a start, we give a brief introduction about the model and theoretically showed that it should have at least 2 distinct states using Jackiw-Rebbi ... -
Fabrication and characterization of amorphous silicon microcavities
(Bilkent University, 1999)In this thesis, planar amorphous silicon microcavities were fabricated and characterized at room temperature. Microcavities were realized by embedding the active amorphous silicon layer between distributed Bragg reflectors, ... -
Fabrication and characterization of Bismuth Hall sensors at room temperature
(Bilkent University, 2003)Small-scale Hall effect devices have attracted a great deal of research interest in recent years. It is well known that bulk single crystal of bismuth exhibit a large magnetoresistance effect and the recognition of this ... -
Fabrication and characterization of GaAs and InAs hall sensors
(Bilkent University, 2004)Scanning Hall Probe Microscopy has become a widely used method for magnetic field measurements in the last decade. For Scanning Hall Probe Microscopy, low noise Hall sensors are fabricated from GaAs and InAs structures ... -
Fabrication and characterization of high speed resonant cavity enhanced Schottky photodiodes
(Bilkent University, 1996)High speed, high external quantum efficiency and narrow spectral linewidth make resonant cavity enhanced (RC E) Schottky photodetector a good candidate for telecommunication applications. In this thesis, we present our ... -
Fabrication and characterization of microelectromechanical resonators
(Bilkent University, 2006)Micromachined mechanical resonators are of considerable interest because of their many important scienti c and technological applications. They can be used as a components of radio-frequency lters in communication ... -
Fabrication and characterization of semiconductor double quantum well diode lasers
(Bilkent University, 1998)In this thesis, semiconductor double quantum well, Fabry-Perot and half ring hisers were fabricated, and these devices were operated and characterized at room temperature. The lasers were fabricated using GaAs/AlGaAs ... -
Fabrication, characterization and simulation of plasmonic cavities
(Bilkent University, 2010)Surface plasmon polaritons (SPPs) originate from the collective oscillations of conduction electrons coupled with photons propagating at metal-dielectric interfaces. A uniform metallic gratings change the dispersion ... -
Fabrication, characterization, and extraction of GaAs mesfets
(Bilkent University, 1994)Metal Semiconductor Field Effect Transistor (MESFET) is the most widely used active element of today’s microwave industry. After development of the MESFET technology, the microwave industry gained a high acceleration, ... -
First principles study of 2D gallium nitride and aluminium nitride in square-octagon structure
(Bilkent University, 2017-07)This thesis, deals with the planar free-standing, single-layer, square-octagon (SO) structures of GaN and AlN. We investigated single-layer and multilayer so-GaN and so-AlN structures, their stability, electronic properties ... -
First-principles investigation of functionalization of graphene
(Bilkent University, 2013)The graphene sheet is a single-atom thick novel material and attracts great interest due to its unique features. However, it is a metallic material with no bandgap, which makes it difficult to integrate in electronic ...
