Berlin 2001 – wissenschaftliches Programm

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Q: Quantenoptik

Q 20: Quantum Effects I

Q 20.2: Vortrag

Mittwoch, 4. April 2001, 16:00–16:15, H 2013

Towards Cavity-QED with Semiconductor Quantum Dots — •Thomas Aichele and Oliver Benson — Universität Konstanz, Fachbereich Physik, Optik-Zentrum Konstanz, Fach M696, 78457 Konstanz

Quantum Dots (QDs) are very often referred to as artificial atoms. Apart from this over-simplification there are striking similarities to quantum optical systems with single atoms or ions.

After the observation of non-classical incoherent effects in QDs such as the discrete fluorescence spectrum and photon anti-bunching [1] there is now a strong attempt to study coherent effects. Furthermore, in recent experiments coupling of semiconductor quantum dots to high-Q cavities has been achieved [2,3].

Here we will discuss a proposal to study cavity QED effects with semiconductor quantum dots and microdisc resonators. In these resonators a very small mode volume together with a reasonably high Q-factor can be realized. Thus, they are promising candidates to reach the strong coupling regime. Additionally, we present a setup for a novel hybrid-resonator, where a movable micro-mirror is scanned across a substrate with quantum dots grown on top of a Bragg-mirror.

First results and future experiments will be presented.

[1] P. Michler et al., Nature 406, 968 (2000)

[2] B. Gayral et al., Appl. Phys. Lett. 75, 1908 (1999)

[3] P. Michler et al., Appl. Phys. Lett. 77, 184 (2000)