Sökning: "density matrix formalism"
Visar resultat 11 - 15 av 19 avhandlingar innehållade orden density matrix formalism.
11. Microscopic Theory of Charge Complexes in Atomically-Thin Materials
Sammanfattning : Atomically-thin materials have emerged as the most promising two-dimensional platform for future optoelectronic applications and for the study of quantum many-body physics. In particular, transition metal dichalcogenides (TMDs) exhibit strong Coulomb interaction, resulting in the formation of tightly-bound electron-hole complexes that dominate optics, dynamics, and transport. LÄS MER
12. Microscopic Modeling of Exciton Propagation and Dissociation in Two-Dimensional Materials
Sammanfattning : Atomically thin materials have been in the spotlight of research during the last decade due to their exceptional properties, providing a platform for the study of novel physical phenomena. In particular, transition metal dichalcogenides (TMDs) have emerged as promising atomically thin materials for future optoelectronic applications owing to their strong light-matter interaction and their high tunability. LÄS MER
13. Microscopic Modeling of Exciton-Polaritons in Two-Dimensional Materials
Sammanfattning : Integrating 2D materials into high-quality optical microcavities opens the door to fascinating many-particle phenomena including the formation of exciton-polaritons. These are hybrid quasi-particles inheriting properties of both the constituent photons and excitons. LÄS MER
14. Quantum Theory of Exciton-Exciton Interactions in Atomically Thin Semiconductors
Sammanfattning : Atomically thin materials such as transition-metal dichalcogenides (TMDs) have emerged as an unprecedented platform for engineering future optoelectronic devices and studying exotic quantum phases of matter. In particular, the strong Coulomb interaction in these materials enables the formation of tightly-bound excitons, electron-hole pairs with neither purely fermionic nor bosonic character. LÄS MER
15. Development of Laser Spectroscopic Techniques for Trace Element Analysis and Combustion Diagnostics
Sammanfattning : This thesis deals with the development of highly sensitive laser-based spectroscopic techniques for trace-element analysis and combustion diagnostics. The work consists of both theoretical as well as experimental applications of the interaction between laser light and atoms or molecules. LÄS MER
