Transcript Poster

This project has received funding from the Federal Ministry of
Education and Research and the European Union’s Seventh
Framework Programme for research, technological development
and demonstration under grant agreement no 605728
Semiconductor nanoplasmonics
Doris Reiter
Institut für Festkörpertheorie
Universität Münster, Münster, Germany
[email protected]
Research field: Theoretical
semiconductor physics
Research interests: Ultrafast
dynamics in quantum dots
 Semiconductors are widely used in computers, smartphones...
 Theoretical modelling of dynamical processes in
semiconductors
 Nanostructuring allows for new, fascinating effects
Specific nanostructure: quantum dots
 Optical control of quantum dots, state preparation,
dephasing of excitonic states
 Size of a few nanometers (1 nm=0.000 000 001 m)
 Fabricated of semiconducting materials: tailored structures
 Properties similar to atoms, but consist of about 104 atoms
 Applications: Optoelectronics, lasers, LEDs, quantum
information, quantum cryptography, solar cells, ...
Example: Quantum dot doped with
a single Manganese (Mn) atom

 Phonon dynamics, squeezed phonons, generation of
phonon wave packets
 Coherent spin dynamics, switching of spin states, timeresolved optical signals
 Twisted light-matter interaction
P.R.I.M.E. project: Semiconductor
nanoplasmonics
Mn has six spin states
“quantum dice”

Switching into each spin states by
optical excitation

Visible in time-resolved spectra by
shift of the absorption line
 Bringing together the best of two world: nanoscaled
semiconductors and plasmonic structures
 Nanostructured metal gives ultimate control over light field:
Mz= - 5/2
Mz=+3/2
Mz= - 1/2
localisation and enhancement of light field
 Light-matter interaction with semiconductor nanostructures
 Modified transitions can be excited
 Very beneficial due to high controllability