Frankfurt 2006 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 41: Quanteneffekte IV

Q 41.4: Vortrag

Mittwoch, 15. März 2006, 11:25–11:40, HII

Quantum Theory of Light Emission from a Semiconductor Quantum-Dot — •Thomas Feldtmann, Lukas Schneebeli, Mackillo Kira, and Stephan W. Koch — Department of Physics and Materials Sciences Center, Philipps-University, Renthof 5, 35032 Marburg, Germany

A number of recent experiments have proven that spectrally isolated quantum dots are capable of emitting non-classical light. For example, pronounced antibunching effects can turn the dot into a source of single photons [1,2] or pairs of strongly correlated photons [3]. This truly quantum-mechanical behavior opens the door to future applications of quantum-dots in quantum cryptography as well as quantum computing and data storaging.

Here, we present a fully quantized theory of light emission from a semiconductor quantum-dot. Coulomb interaction and light-matter coupling are treated consistently on the same level of sophistication. We use a cluster-expansion approach that can be extended to higher-order correlations so as to calculate the quantum statistics of emission.

[1] P. Michler et al., Science 290, 2282 (2000)

[2] C. Santori et al., Phys. Rev. Lett. 86, 1502 (2001)

[3] E. Moreau et al., Phys. Rev. Lett. 87, 183601 (2001)