Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 30: QuanTour III – Spin Physics & Coherence
Q 30.6: Vortrag
Mittwoch, 4. März 2026, 16:00–16:15, P 1
Fourier-transform limited, blinking-free quantum dots — •Patricia Kallert1, Lukas Hanschke1, Eva Schöll1, Melina Peter2, Juan Nicolás Claro-Rodríguez1, Ailton José Garcia Jr.2, Saimon Filipe Covre da Silva2, Santanu Manna2, Armando Rastelli2, and Klaus D. Jöns1 — 1PhoQS Institute, CeOPP, and Department of Physics, Paderborn University, Paderborn, Germany — 2Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria
Most photonic quantum technologies require a source of highly indistinguishable photons. Achieving Fourier-transform limited photons is considered a pathway to near perfect indistinguishability. Our work highlights the capability of semiconductor quantum dots. Typically charge and spin noise limit the proximity to it, while the preparation of the quantum dot in a charge-stable state is crucial for non-blinking behaviour. [1] The integration of droplet-etched GaAs in AlAs in p-i-n diodes leads to Fourier-transform limited and blinking-free single-photon emission that leads to raw Hong-Ou-Mandel visibilities of (91.7 ± 0.6) % for the negative trion at resonant π excitation.
[1] A. V. Kuhlmann et al. Charge noise and spin noise in a semicon- ductor quantum device. Nature Physics (2013), pp. 570-575. issn: 1745-2481. doi: 10.1038/nphys2688.
Keywords: Fourier-transform limit; Semiconductor quantum dots