© Doris Reiter

Abstand

Ultrafast Optics in Nanostructured Solids

Welcome to the AG Reiter

Our research group studies the theoretical modelling of dynamics on ultra short time and length scales. An introduction to our research can be found here. My CV and further information can be found in the research portal of the WWU Münster.

We have several collaborations within the WWU Münster, in particular with the AG Kuhn and the AG Bratschitsch and with other theoretical and experimental groups all over the world, e.g., with Martin Axt from Bayreuth, Germany, Ortwin Hess from London, UK, Jacek Kasprzak from Grenoble, France, Paweł Machnikowski from Wrocław, Poland.

We are always happy to talk about our work. If you are interested in a bachelor or master thesis in our group, please contact us via email and make an appointment.
Doris Reiter
|
News

New review paper on the impact of phonons on optical control of quantum dots

Semicond. Sci. Technol. 34, 063002 (2019)
© Doris Reiter

The optical control of semiconductor quantum dots plays a crucial role in using quantum dots as photon sources; an important ingredient for applications in quantum information technology. In contrast to atoms, which are rather isolated from their environment, quantum dots are solid state systems and hence their electronic degrees of freedom interact strongly with the lattice vibrations, i.e. the phonons. In this paper, we review the latest developments on the theoretical description and experimental results regarding the influence of the electron-phonon interaction on the optical state preparation of a semiconductor quantum dot.

Read more in the publication ...

Doris Reiter
|

New publication on the theoretical description of optical vortices

Phys. Rev. B 99, 155306 (2019)
© Frank Lengers

When a semiconductor nanostructure is excited by light, so-called excitons (electron-hole pairs) can form. The spatio-temporal dynamics of these excitons is strongly affects by the Coulomb interaction. When the strength of the excitation changes, the dynamics of the excitons is modified significantly. As an example, we have considered the exciton dynamics in a semiconductor quantum wire. We have developed and utilized a wave function approach. With this, we have studied the dynamics of a wave packet traveling along the wire under different excitation conditions.

This work results from a collaboration with Roberto Rosati, who is now at Chalmers, Gothenburg.

Read more in the publication ...

Doris Reiter
|

New publication on a new detection scheme for electron dynamics

J. Phys.: Condens. Matter 31 (2019) 28LT01
© Roberto Rosati

Electrons that move in a 2D semiconductor can scatter at obstacles resulting in a diffraction pattern due to their wave character. To detect such a pattern we propose to use the scattering of the electrons into a strongly confined potential. Because the scattering happens locally, the process is able to resolve the spatiotemporal dynamics of the electrons. Our method could be used as detection scheme for electron dynamics on ultrafast time and nanometric length scales.

This work results from a collaboration with Roberto Rosati, who is now at Chalmers, Gothenburg.

Read more in the publication ...