Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 58: Quantum Dots: Optical Properties IV

HL 58.1: Hauptvortrag

Mittwoch, 22. März 2017, 14:45–15:15, POT 151

Towards an ideal semiconductor source of polarization entangled photons — •Fei Ding — Institute for Solid State Physics, Leibniz Universität Hannover, Germany — Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research Dresden, Germany

Sources of polarization entangled photons are important components for building optical quantum networks [1]. Semiconductor quantum dots (QDs) are among the most promising sources due to several undeniable advantages. However, they are far from being ideal and several critical challenges need to be solved for practical applications.

In this talk I will review our recent efforts in developing a high yield, high fidelity and wavelength-tunable entangled photon sources. A large ensemble of as-grown entangled photon emitters can be obtained with a yield close to 100% and high entanglement fidelity (up to 0.9) [2]. The wavelength mismatching between different source can be solved by using a unique strain tuning technique [3,5]. The superior properties of these sources, combined with the possibilities of electrical injection [5] and on-chip integration [6], will eventually lead to the development of an ideal semiconductor entangled photon source.

[1] J.W. Pan et al. Rev. Mod. Phys. 84, 777 (2012) [2] R. Keil, M. Zopf, F. Ding* et al. arXiv:1611.03717 (2016) [3] F. Ding* et al. Phys. Rev. Lett. 104, 067405 (2010) [4] Y. Chen, F. Ding* et al. Nature Commun. 7, 10387 (2016) [5] J. Zhang, F. Ding* et al. Nature Commun. 6, 10067 (2015) [6] Y. Zhang, F. Ding* et al. Nano Lett. 16, 5785 (2016)