Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 53: Poster II
HL 53.24: Poster
Mittwoch, 9. März 2016, 09:30–13:30, Poster A
Hybrid approach towards fast electronic control of quantum dot — •Alex Widhalm1, Amlan Mukherjee1,2, Nandlal Sharma1, Dirk Reuter1,3, Andreas Thiede2,3, and Artur Zrenner1,3 — 1Department Physik, Universität Paderborn, Warburger Str. 100, 33098 Paderborn, Germany — 2Höchstfrequenzelektronik, Universität Paderborn, Warburger Str. 100, 33098 Paderborn, Germany — 3Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Warburger Str. 100, 33098 Paderborn, Germany
A hybrid approach to coherent manipulation of transitions in a quantum dot using combinations of electric and optical pulses promises possibilities of new quantum devices. In this work, we intend to demonstrate a technique for nonlinear and coherent control of transitions within the coherence time in InGaAs quantum dot photodiodes by ultrafast electric fields. The new functional structure comprises of a SiGe hetero-bipolar electronic circuit which generates picosecond electric fields to drives a single quantum dot photodiode. While the amplitude of excited states can be coherently controlled with optical pulses, the coherent phase and resonance conditions for exciton and biexciton transitions can be manipulated by ultrafast Stark effect tuning. Here we present the room temperature characteristics of the first generation picosecond pulse circuit designed. Also, we report the progress in the system integration and design of fast quantum dot photodiode.