SKM 2021 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 13: Poster Session III
HL 13.3: Poster
Tuesday, September 28, 2021, 13:30–16:30, P
Off-resonant excitation swing up of a quantum emitter — •Thomas Bracht1, Michael Cosacchi2, Tim Seidelmann2, Moritz Cygorek3, Alexei Vagov2,4, Martin Axt2, Tobias Heindel5, and Doris Reiter1 — 1Institut für Festköpertheorie, Universität Münster,Germany — 2Theoretische Physik III, Universität Bayreuth, Germany — 3Heriot-Watt University, Edinburgh, United Kingdom — 4ITMO University, St. Petersburg, Russia — 5Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany
Controlled preparation of a quantum emitter is key for many of its applications, for example as a single photon source. Here, we present a scheme which uses pulses detuned significantly below the excited-state energy that lead to a swing up of the quantum emitter occupation. We show that a two-color excitation leads to high final excited-state occupation and discuss the conditions under which the scheme works. Applied to semiconductor quantum dots, the proposed swing-up scheme results in the emission of high-quality single photons. The main advantage of our scheme compared to Rabi rotations is that no filtering is needed in order to separate the resulting signal from the laser source. Another advantage is that in contrast to off-resonant schemes relying on phonon-assisted transitions, our scheme does not depend on any auxiliary quasi-particles. In summary, we are proposing an experimentally feasible swing-up scheme to excite a quantum emitter yielding high-quality photon emission for quantum technology.