August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【412】High fidelity biexciton generation through adiabatic rapid passage in GaAs quantum dots

Aug 31, 2021, 4:45 PM
15m
Room E

Room E

Talk Atomic Physics and Quantum Optics Atomic Physics and Quantum Optics

Speaker

Mr Florian Kappe (Department of Experimental Physics)

Description

Semiconductor quantum dots are bright, on-demand single photon sources to realise quantum communication devices. An important requirement to realise such devices is the high-fidelity preparation of the biexciton state since the subsequent radiative decay produces entangled photon pairs. Although resonant excitation to the biexciton state has been successful, its sensitivity to the excitation intensity fluctuations and transition dipole moment calls for a robust preparation scheme. Here we demonstrate adiabatic rapid passage with chirped picosecond laser pulses in GaAs/AlGaAs quantum dots at 4K, and show the high fidelity generation of biexcitons, supported by theoretical simulations. Our results pave the way for utilizing quantum dots as sources of deterministic time-bin entangled photons.

Primary authors

Mr Yusuf Karli (Department of Experimental Physics) Mr Florian Kappe (Department of Experimental Physics) Dr Vikas Remesh (University of Innsbruck) Dr Santanu Manna (Institute of Semiconductor and Solid State Physics) Prof. Armando Rastelli (Institute of Semiconductor and Solid State Physics) Prof. Gregor Weihs (Department of Experimental Physics)

Presentation materials

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