Dresden 2026 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 20: Poster I

HL 20.52: Poster

Tuesday, March 10, 2026, 18:00–20:00, P1

SUPER Scheme in Telecom-Wavelength Quantum Dots — •Zenghui Jiang — Leibniz Universität Hannover, Institut für Festkörperphysik, Appelstraße 2, 30167 Hannover

Co-authors: Vikas Remesh, Frederik Benthin,Thomas Bracht, Michael Jetter, Simone Portalupi, Doris Reiter, Peter Michler, Michael Zopf, Fei Ding

Abstract:

To obtain the best photon properties from quantum dots (QDs), direct driving between the S-shell and the ground state i.e., resonant excitation is typically required. However, laser filtering under resonant excitation is extremely challenging because the QD emission and the excitation laser lie at essentially the same wavelength. The recently proposed and experimentally demonstrated SUPER scheme addresses this challenge by using two relatively detuned laser pulses to directly drive the two-level system. Since the excitation and emission wavelengths are well separated, the scattered excitation laser can be spectrally filtered much more easily. In our work, we implement a pulse shaper based on a spatial light modulator to generate two well-defined laser pulses from a single broadband pulse for the SUPER scheme. In addition, we investigate SUPER excitation using two narrow-linewidth continuous-wave lasers as a comparison, enabling a clearer understanding of the excitation dynamics and the differences relative to pulsed operation.

Keywords: SUPER; Telecom; Quantum Dot