Dept. of Physics - Master's degree
Recent Submissions
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Investigation of optical residual absorption in graphene
(Bilkent University, 2018-03)Graphene, a 2-dimensional crystal of carbon, can absorb 2.3% of light over a very broad spectrum. Doped graphene, however has a gap in optical absorption due to the Pauli blocking principle. For doped graphene, the interband ... -
Modeling of semiconductor devices based on quantum wells: quantum cascade laser as an example
(Bilkent University, 2018-02)It has been two decades since the quantum-cascade lasers (QCLs) have emerged in 1994 for the first time. As time goes on, QCLs reach to higher points scientifically and economically and the usage of QCLs devices continually ... -
Model description of friction on planar and buckled two dimensional materials
(Bilkent University, 2018-01)The law of friction has been known since the 18th century but yet, the development on the tribology field was established in the last decades mainly by the invention of frictional force microscope (FFM), which enabled ... -
Tight binding modeling of two dimensional and quasi-two dimensional materials
(Bilkent University, 2017-10)Since the advent of graphene, two-dimensional (2D) materials have consistently been studied owing to their exceptional electronic and optical properties. While graphene is completely two-dimensional in nature, its other ... -
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. ... -
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 ... -
First principles study of 2D gallium nitride and aluminium nitride in square-octagon structure
(Bilkent University, 2017-08)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 ... -
Multi-exciton states in flexible Rydberg aggregates
(Bilkent University, 2017-07)Flexible Rydberg aggregates, assemblies of highly excited atoms, provide a platform to investigate quantum phenomena like energy transport and conical intersections. This can be achieved by doping the aggregate with an ... -
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 ... -
Non-boltzmann stationary distributions and non-equilibrium relations in active baths
(Bilkent University, 2016-10)Most natural and engineered processes, such as biomolecular reactions, protein folding, and population dynamics, occur far from equilibrium and, therefore, can- not be treated within the framework of classical equilibrium ... -
Frictional properties of quasi-two-dimensional materials from the Prandtl-Tomlinson model
(Bilkent University, 2016-10)Tribology, the study of friction, is both an old theoretical problem in physics and an area of great practical importance. The invention of experimental instruments such as Atomic Force Microscope (AFM) has lead to the ... -
Dipolar bose-einstein condensate in a cylindrically symmetric trap
(Bilkent University, 2016-08)Bose-Einstein Condensate (BEC) and particularly its stability dynamics has been a subject to many investigations since the first realization of this new condensed state in alkali atoms interacting via short range potential. ... -
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 ... -
Study of anisotropic particles in active bath
(Bilkent University, 2015)Brownian (passive) particles undergo random motion due to thermal agitation in the surrounding medium. In recent years, a lot of attention has been devoted to study active Brownian particles, i.e., microscopic particles ... -
Quantum properties of multipole radiation
(Bilkent University, 2002)In this study, multipole expansion of quantum electromagnetic radiation is constructed and quantized by canonical transformation with increasing demand of some modern research areas of physics such as entanglement of the ... -
Dynamical effects of noise on nonlinear systems
(Bilkent University, 2014)Randomness and nonlinear dynamics consitute the most essential part of many events in nature. Therefore, a better and comprehensive understanding of them is a crucial step in describing natural phenomena as well as the ... -
Novel hybrid light emitting diodes with multiple assemblies of nanocrystals to generate and tune white light
(Bilkent University, 2007)Today approximately one third of the world population (about two billion people) in under-developed countries has no access to electricity and relies on unhealthy, costly and low-quality fuel-based lighting for home ... -
Phonon-coupling and magnetic fields effects on the binding energy of a hydrogenic impurity in two dimensions
(Bilkent University, 2006)Electron-phonon interaction and ınagne t ic field effects on a two-dimensional electran bound to a Coulomb center is st udied within the fraınework of a variational appıoxinıat ion consisting of an adiabatic polaronic wave ... -
The growth, fabrication and characterization of high performance AI(formula)Ga(formula)N metal-semiconductor-metal photodiodes
(Bilkent University, 2006)High performance UV photodetectors have attracted unwarranted attention for various applications, such as in military, telecommunication, and biological imaging, as an AlxGa1-xN material system is also rather suitable ...
