Sökning: "Indirect Exciton"
Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Indirect Exciton.
1. 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
2. Photoluminescence Studies of Polytype Heterostructured InP Nanostructures
Sammanfattning : The interface between two semiconductors significantly influences their optical and electronic properties. In contrast to traditional material heterostructures, polytype heterostructures between wurtzite (wz) and zincblende (zb) segments in homomaterial InP nanostructures exhibit sharp interfaces with minimal strain. LÄS MER
3. Moiré Exciton Landscape and its Optical Properties in Two-Dimensional Semiconductors
Sammanfattning : In recent years the emergence of atomically thin nanomaterials has led to a new research venue, revealing intriguing properties making them an excellent platform to study many-particle quantum phenomena. Of particular interest is the class of nanomaterials called transition metal dichalcogenides (TMDs), where the strong light-matter coupling reveals promising opportunities in the pursuit of novel optoelectronical devices. LÄS MER
4. Microscopic Theory of Externally Tunable Exciton Signatures of Two-Dimensional Materials
Sammanfattning : Atomically thin transition metal dichalcogenides (TMDs) are in the focus of current research due to their efficient light-matter interaction and the remarkably strong Coulomb interaction that leads to tightly bound excitons. Due to their unique band structure, TMDs show a variety of bright and optically inaccessible dark excitonic states. LÄS MER
5. Spectroscopy of semiconductor quantum dots
Sammanfattning : Quantum dots in the Si/Ge and InAs/GaAs materials systems are examined by means of photoluminescence. The spectroscopic study of Si/Ge quantum dots has demonstrated two different radiative recombination channels in the type II band alignment: The spatially direct transition inside the dot and the spatially indirect transition across the dot interface. LÄS MER