Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.43: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
Non-classical correlations between ultra-bright broadband twin beams — •Fabian Gumpert1, 2 and Maria Chekhova1, 2 — 1Friedrich Alexander Universität, Erlangen, Deutschland — 2Max Planck Institut für die Physik des Lichts, Erlangen, Deutschland
We investigate non-classical correlations between ultra-bright broadband twin beams. These beams are generated via high-gain parametric down conversion (PDC) in an aperiodically poled lithium niobate crystal. The spectral bands of the idler and signal beams are many times broader than in the case of a uniform (periodically poled) crystal. These ultra-bright broadband twin beams are particularly interesting for quantum information applications. The process of non-phase matched sum frequency generation (SFG) is used to measure the time of photon-number correlations between the twin beams. Because of dispersion effects within the aperiodically poled crystal the photons generated through PDC get additional spectral-dependent delays, which increase the observed correlation time. To reduce the correlation times, additional dispersive elements are added to the setup. A correlation time of 90 fs was recorded until now [1] and by designing the dispersive elements we are going to achieve much shorter correlation times.
[1] M. V. Chekhova, S. Germanskiy, D. B. Horoshko, G. Kh. Kitaeva, M. I. Kolobov, G. Leuchs, C. R. Phillips and P. A. Prudkovskii, arXiv:1710.08330 (2017).