Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics II
Q 40.61: Poster
Mittwoch, 8. März 2017, 17:00–19:00, P OG2
From incoherent to coherent: modeling quantum-dot superluminescent diodes — •Franziska Friedrich and Reinhold Walser — Institut für Angewandte Physik, Technische Universität Darmstadt
Commercial devices for optical coherence tomography greatly benefit from the appealing features of broadband light emitting quantum-dot superluminescent diodes (QDSLDs), where light is generated in the regime of amplified spontaneous emission (ASE).
But also from the fundamental point of view, these devices exhibit uncommon properties considering field and intensity correlations, g(1)(τ) and g(2)(τ): a reduction of g(2)(0) from 2 to 1.33 at T=190 K was observed in the lab in 2011 [1].
The understanding of these hybrid coherent light states, which are simultaneously incoherent in g(1)(τ) and coherent in g(2)(τ), represents an interesting and challenging topic of research.
In the present contribution, we will discuss a multimode quantized field theory of the QDSLD and study the generation of the amplified spontaneous emission on a microscopic level [2]. As a main result, we analyze the external power spectrum. Comparison with experimental measurements exhibits good agreement.
M. Blazek, W. Elsäßer, Phys. Rev. A 84, 063840 (2011)
to be published