Sökning: "Institutionen för teoretisk fysik linköpings universitet"

Hittade 5 avhandlingar innehållade orden Institutionen för teoretisk fysik linköpings universitet.

1. 1. Synthesis and Characterization of ZnO Nanostructures

   Författare :Li Li Yang; Qingxiang Zhao; Magnus Willander; Jinghai Yang; Noel Magnea; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Zinc oxide; nanostructures; heterostructures; controllable growth; optical properties; postannealing; diffusion coefficient; Semiconductor physics; Halvledarfysik;

   Sammanfattning : One-dimensional ZnO nanostructures have great potential applications in the fields of optoelectronic and sensor devices.  Therefore, it is very important to realize the controllable growth of one-dimensional ZnO nanostructures and investigate their properties. LÄS MER

3. 2. Cubic Response Theory and the Electromagnetic Properties of Ground and Excited States

   Författare :Dan Jonsson; Aage E. Hansen; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis is devoted to the study of analytical response theory up to third order and its application to electromagnetic properties of ground and excited states. Computationally tractable expressions for the cubic response function for SCF and MCSCF wave functions have been derived and implemented in a computer code. LÄS MER

4. 3. Spectroscopic studies of InGaAs/GaAs/A1GaAs quantum dots and wires

   Författare :Fredrik Karlsson; Manfred Bayer; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : It is demonstrated that the photoluminescence (PL) spectra of single selfassembled lnAs/GaAs quantum dots (QDs) are very sensitive to excitation energy and crystal temperature, which is explained in terms of modulation of the effective diffusivity of the photogenerated carriers affecting the capture probability into theQD. This effect results in a population of the QD with excess electrons, and can be used as a simple tool to create and study charged exciton complexes. LÄS MER

5. 4. Nonlinear Optical Properties of Fullerenes, Oligomers, and Solutions

   Författare :Patrick Norman; Hans Ågren; David M. Bishop; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This work presents development and applications of modern tools in ab initio quantum chemistry for obtaining linear and nonlinear response properties of molecules in the gas phase and in solution. The external perturbing fields are primarily electric in nature with frequencies in the optical region. LÄS MER

7. 5. Electronic properties of organic molecular materials

   Författare :Mikael Unge; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : In the context of molecular based electronics, different molecular systems have been studied. In molecular crystals of pentacene, the conduction process has been reported to occur in a single layer in field-effect transistor applications. LÄS MER