Regensburg 2025 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 29: Poster II
HL 29.62: Poster
Dienstag, 18. März 2025, 18:00–20:00, P1
Towards Efficient Entangled Photon Pair Sources by Semiconductor Quantum Dots in Planar Cavities — •Aditi Javali1, Raphael Joos1, Ponraj Vijayan1, Lena Engel1, Tobias Huber-Loyola2, Sven Höfling2, Michael Jetter1, Simone Luca Portalupi1, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQST) and SCoPE, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany — 2Lehrstuhl für Technische Physik, Physikalisches Institut, Julius-Maximilians-Universität Würzburg, 97074 Würzburg, Germany
Since the EPR violation, entangled photons have become key protagonists in quantum technology, serving as communication carriers via polarization qubits. Photon pairs entangled in telecom C-band are particularly advantageous, as this wavelength range minimizes dispersion and loss in standard optical fibers, enabling long-distance communication with reduced signal degradation. In this work, we demonstrate the generation of entangled photon pairs in the telecom C-band using InAs quantum dots integrated with a planar photonic cavity. The cavity enhances photon emission rates and collection efficiency with high entanglement fidelity. The biexciton state, emitting the entangled pair, is prepared using a two-photon excitation scheme. The entanglement is verified through state tomography, confirming the strong quantum correlations between the photons. This work highlights telecom C-band quantum dots' potential as efficient entangled-photon sources for high-performance quantum communication.
Keywords: quantum dot; telecom c-band; entanglement