Berlin 2024 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 37: Poster IV
HL 37.12: Poster
Wednesday, March 20, 2024, 18:00–20:30, Poster F
Quantum dot photon emitter for quantum network — •Xuelin Jin1,2, Selma Delic1,2, Zheng Zeng1,2, Nils von den Driesch1,3, Alexander Pawlis1,3, Detlev Gruetzmacher1,2,3, and Beata Kardynal1,2 — 1Peter Grünberg Institute 9, Forschungszentrum Jülich, 52425 Jülich, Germany — 2Department of Physics, RWTH Aachen, 52074 Aachen, Germany — 3Peter Grünberg Institute 10, Forschungszentrum Jülich, 52425 Jülich, Germany
Connecting different spin qubits using photonic qubits could facilitate building networks that would benefit from the inherent advantage of the individual subsystems. An efficient transfer of a qubit from a photon to the spin qubit requires matching of the energies and the bandwidths of the photon wave packet and the spin qubit optical transitions. While non-linear optical processes can be used for wavelength conversion[1], there is no well-established methods of the photon bandwidth conversion. Here, we show the design of an epitaxial quantum dot device that aim to use electrostatic gates to manipulate the bandwidth of the photons emitted from InAs quantum dots to improve the match to the spin qubits realized in ions. We show that application of electrostatic fields can change the overlap of the electron and the hole wavefunctions, leading to different radiative recombination rates. We will discuss the conditions that the heterostructure has to fulfill for the device operation and will show the status of its fabrication, which has centered on optimizing the epitaxial growth of the material. [1] A. Hamer, D. Fricker, M. Hohn, P. Atkinson, M. Lepsa, S. Linden, F. Vewinger, B. Kardynal,S. Stellmer, Opti.Lett.47,1778-1781(2022)
Keywords: Quantum dot; Photon emitter; Spin qubits; Photonic qubits; Quantum network