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NIM nanosystems initiative munich

Tuesday, 09 May, 2017

Why I am optimistic about semiconductor quantum dot based entangled photon sources

Prof. Fei Ding, Leibniz University Hannover and IFW Dresden

Speaker: Prof. Opens external link in new windowFei Ding, Institute for Solid State Physics, Leibniz University Hannover,  Institute for Integrative Nanosciences, IFW Dresden

Time:Tuesday, 9 May 2017, 13:15h

Venue: Seminar room EG 0.001, Zentrum für Nanotechnologie und Nanomaterialien, Am Coulombwall 4a, 85748 Garching


Abstract (Initiates file downloadpdf):

Entangled photon sources are playing a crucial role in photonic quantum information science. Self-assembled semiconductor quantum dots (QDs) are among the most promising sources for the on-demand generation of entangled photons. However, to date these sources 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 QD-based entangled photon source with the best possible performances. 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). The wavelength mismatching between different sources can be solved by using a unique strain tuning technique developed in our group. The superior properties of these sources, combined with the demonstrations of electrical injection and on-chip integration, will eventually make the semiconductor QDs an ideal entangled photon source for the practical quantum applications.


Tuesday, 30 January, 2018

Lights topology at the nanoscale –faithfulness, tragedy and usefulness

Prof Dr Laurens (Kobus) Kuipers, Kavli Institute of Nanoscience, Delft University of Technology, The Netherlands


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