Publikationsserver
Microscopic Theory of Linear and Nonlinear Terahertz Spectroscopy of Semiconductors
This Thesis presents a fully microscopic theory to describe terahertz (THz)-induced processes in optically-excited semiconductors. The formation process of excitons and other quasi-particles after optical excitation has been studied in great detail for a variety of conditions. Here, the formation pr...
Shranjeno v:
| Glavni avtor: | |
|---|---|
| Drugi avtorji: | |
| Format: | Dissertation |
| Jezik: | angleščina |
| Izdano: |
Philipps-Universität Marburg
2008
|
| Teme: | |
| Online dostop: | PDF-Volltext |
| Oznake: |
Označite
Brez oznak, prvi označite!
|
| Izvleček: | This Thesis presents a fully microscopic theory to describe terahertz (THz)-induced processes in optically-excited semiconductors. The formation process of excitons and other quasi-particles after optical excitation has been studied in great detail for a variety of conditions. Here, the formation process is not modelled but a realistic initial many-body state is assumed. In particular, the linear THz response is reviewed and it is demonstrated that correlated quasi-particles such as excitons and plasmons can be unambiguously detected via THz spectroscopy. The focus of the investigations, however, is on situations where the optically-excited many-body state is excited by intense THz fields. While weak pulses detect the many-body state, strong THz pulses control and manipulate the quasi-particles in a way that is not accessible via conventional techniques. The nonlinear THz dynamics of exciton populations is especially interesting because similarities and differences to optics with atomic systems can be studied. |
|---|---|
| Fizični opis: | 139 Seiten |
| DOI: | 10.17192/z2009.0275 |