Sökning: "multiple band structures"
Visar resultat 1 - 5 av 23 avhandlingar innehållade orden multiple band structures.
1. GaN/AlN Multiple Quantum Well Structures
Sammanfattning : The III-nitride semiconductors: InN, GaN and AlN are promising for photonic, high power and high temperature electronic devices. Their large and direct band gaps cover the range 0.7 to 6.2 eV, i. LÄS MER
2. Road traffic noise reduction by multiple scattering and absorption mechanisms
Sammanfattning : Millions of people in Europe, and even more on a global scale, are affected by environ- mental noise. Traffic related noise is estimated to cause a yearly loss of approximately one million healthy life years in Western Europe, which is mostly related to road traffic noise. LÄS MER
3. Electronic Structure Calculations: Materials with Weak and Strong Correlations
Sammanfattning : This thesis is devoted to studies of various electronic properties which can be extracted from photoemission spectroscopy. Both weakly and strongly correlated systems are discussed, ranging from free electron metal surfaces to strongly correlated copper oxide compounds. LÄS MER
4. Photonic crystals and photocatalysis : Study of titania inverse opals
Sammanfattning : Due to an increase of human activity, an increase health risk has emerged from the presence of pollutants in the environment. In the transition to renewable and sustainable life style, treatment of pollutants could support the shifting societies. LÄS MER
5. Spectroscopic studies of doped GaAs/ AlGaAs quantum wells in the high carrier density regime
Sammanfattning : This thesis is mainly based on experimental and theoretical investigations of the electronic structures and optical properties of p-type doped GaAs/AlGaAs quantum wells using a combination of photoluminescence and magneto-optical spectroscopy in the presence of high magnetic fields.The effects of high hole densities up to 3. LÄS MER