Stefan Grisard, AG Akimov
What is the challenge of my research project? Why am I eager to do it?
Our research group investigates the phenomenon of photon-echoes from semiconductor nanostructures using four-wave-mixing spectroscopy. In a typical photon-echo experiment, we excite an inhomogenously broadened ensemble of emitters, such as excitons, by a laser pulse. A time-shifted second pulse inverts the subsequent dephasing of the ensemble resulting in the photon-echo - a coherent emission of light. Studies of photon-echoes allow to acquire information about the coherent dynamics of individual emitters in large ensembles. Moreover, the photon-echo protocol fulfills the requirements for quantum memory applications. Quantum memories store qubits and release them on demand, which is essential for synchronizing quantum operations in a computer.
Therefore, I believe that our investigations are placed within a thrilling and promising field of research.