Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 63: Poster: Quantum Dots and Optics

HL 63.81: Poster

Wednesday, March 22, 2017, 15:00–19:00, P1A

Optoelectronic coupling between colloidal quantum dots and quantum wells — •Mikko Wilhelm, Maria Steiger, Ruichan Lyu, Wolfgang Parak, and Wolfram Heimbrodt — Philipps-Universität Marburg

The interaction between colloidal CdS/ZnS core-shell quantum dots on a semiconductor substrate with buried quantum well is studied. The MBE grown quantum well structures consist of a 5nm thick ZnSe quantum well with a (Zn,Mn)Se barrier of different Mn concentrations. Quantum dots of different sizes have been deposited via spin coating on the surface of the quantum well structure. In order to investigate the energy transfer between the excitons in the quantum dots and the excitons in the quantum wells, cw- and time resolved luminescence measurements as well as photoluminescence excitation measurements have been performed at low temperatures (10K) and external magnetic fields up to 7 Tesla. To reveal the transfer properties the results of the hybrid system will be compared to the separated systems and discussed in detail.