Browsing Theses - Department of Physics by Title
Now showing items 182-201 of 228
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Scanning hall probe microscopy (SHPM) using quartz crystal AFM feedback
(Bilkent University, 2005)Scanning Hall Probe Microscopy (SHPM) is a quantitative and non-invasive technique for imaging localized surface magnetic field fluctuations such as ferromagnetic domains with high spatial and magnetic field resolution ... -
Selective plasmonic control of excitons and their non-radiative energy transfer in colloidal semiconductor quantum dot solids
(Bilkent University, 2009)To date extensive research has proved that semiconductors and metals exhibit extraordinary optical properties in nano-dimensions compared to their bulk counterparts. For example, an interesting effect is observed in ... -
Silicon and carbon based nanowires
(Bilkent University, 2004)Nanowires have been an active field of study since last decade. The reduced dimensionality end size allowing electrons can propagate only in one direction has led to quantization which are rather different from the bulk ... -
Silicon based dielectrics : growth, characterization, and applications in integrated optics
(Bilkent University, 2005)In recent years, growing attention has been paid to silicon based dielectrics, such as silicon oxynitrides, silicon nitrides, and semiconductor doped silicon oxides, all combined under the name silica on silicon technology. ... -
Silicon nanocrystal doped polymer nanowire arrays
(Bilkent University, 2013) -
Silicon nanowire-based complex structures : A Large-scale atomistic electronic structure and ballistic transport
(Bilkent University, 2014)While the hierarchical assembling as well as the dramatic miniaturization of Si nanowires (NWs) are on-going, an understanding of the underlying physics is of great importance to enable custom design of nanostructures ... -
Silicon oxynitride layers for applications in optical waveguides
(Bilkent University, 2000) -
Silicon-on-insulator optical waveguides and waveguide devices
(Bilkent University, 2000)Silicon-on-insulator(SOI) optical waveguides, directional couplers and some types of MMI couplers were designed, fabricated and characterized at a wavelength of 1.55 /im. Effective index method and the single mode ... -
Size controlled germanium nanocrystals in dielectrics : structural and optical analysis and stress evolution
(Bilkent University, 2017-09)Group IV semiconductor nanocrystals, namely silicon and germanium have attracted much interest in the past two decades due to their broad applications in photovoltaic, memory, optoelectronic, medical imaging and ... -
Slow light in Germanium nanocrystals
(Bilkent University, 2009)The phenomena of quantum coherence has been applied with great success in the atomic systems. For optoelectronic applications the interest is inherently directed towards the semiconductor heterostructures. Large number ... -
Sonic Hawking Radiation from a blackhole laser
(Bilkent University, 2018-06)The quantum thermal radiation from a black hole (BH) known as “Hawking Radiation” or “Black Hole Evaporation” results from studying quantum fields in the curved space-time of the horizon of a BH. Experimentally, the ... -
Sorting of chiral microswmmers
(Bilkent University, 2014)Microscopic swimmers, for example chemotactic bacteria and cells, are capable of directed motion by exerting a force on their environment. In some cases, including bacteria and spermatozoa swimming near boundaries, or ... -
Spatial properties of quantum multipole radiation
(Bilkent University, 2000)Complete quantum mechanical treatment of multipole radiation is constructed. Vacuum noise of polarization for transversally and longitudirudly polcirized fields is discussed for different total angular momentum values ... -
Spintronic properties of carbon and silicon based nanostructures
(Bilkent University, 2007)In this thesis, nanostructures which may display novel spintronic behaviors are revealed and their properties are investigated by using first-principles methods. We have concentrated on three different systems, namely ... -
Stability of two dimensional (2D) structures based on GaAs
(Bilkent University, 2015-08)Graphene is a two dimensional material isolated for the first time in 2004. After this, two dimensional materials has become an appealing research area for the scientists because of their exotic properties. In search ... -
Strained empirical pseudopotential generation from hybrid density functionals: GaAs, InAs,GaSb, InSb
(Bilkent University, 2015-08)Self-assembled quantum dots composed of III-V compounds receive considerable attention due to their potential applications on spintronics and quantum informa- tion processing. Here, lattice mismatch between two materials ... -
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 ... -
Strongly interacting one-dimensional Bose condensates
(Bilkent University, 2000)Recent observation of Bose-Einstein condensation in dilute alkali gzises led to a great interest in this area both experimentally and theoretically. The most important characteristics of a Bose-Einstein condensate is ... -
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 ... -
A study of adsorption of single atoms on carbon nanotubes
(Bilkent University, 2003)The adsorption of individual atoms on the semiconducting and metallic singlewall carbon nanotubes (SWNT) have been investigated by using first-principles pseudopotential plane wave method within Density Functional Theory. ...
