Coherent Swing‐Up Excitation for Semiconductor Quantum Dots
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Published:2024-01-28
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ISSN:2511-9044
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Container-title:Advanced Quantum Technologies
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language:en
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Short-container-title:Adv Quantum Tech
Author:
Boos Katarina1ORCID,
Sbresny Friedrich1,
Kim Sang Kyu1,
Kremser Malte2,
Riedl Hubert2,
Bopp Frederik W.2,
Rauhaus William1,
Scaparra Bianca1,
Jöns Klaus D.3,
Finley Jonathan J.2,
Müller Kai1,
Hanschke Lukas3
Affiliation:
1. Walter Schottky Institut TUM School of Computation Information and Technology, and MCQST Technische Universität München Am Coulombwall 4 85748 Garching Germany
2. Walter Schottky Institut TUM School of Natural Sciences, and MCQST Technische Universität München Am Coulombwall 4 85748 Garching Germany
3. Institute for Photonic Quantum Systems (PhoQS) Center for Optoelectronics and Photonics Paderborn (CeOPP) and Department of Physics Paderborn University Warburger Str. 100 33098 Paderborn Germany
Abstract
AbstractDeveloping coherent excitation methods for quantum emitters ensuring high brightness, optimal single‐photon purity and indistinguishability of the emitted photons has been a key challenge in the past years. While various methods have been proposed and explored, they all have specific advantages and disadvantages. This study investigates the dynamics of the recent swing‐up scheme as an excitation method for a two‐level system and its performance in single‐photon generation. By applying two far red‐detuned laser pulses, the two‐level system can be prepared in the excited state with near‐unity fidelity. The successful operation and coherent character of this technique are demonstrated using a semiconductor quantum dot (QD). Moreover, the multi‐dimensional parameter space of the two laser pulses is explored to analyze its impact on excitation fidelity. Finally, the performance of the scheme as an excitation method for generating high‐quality single photons is analyzed. The swing‐up scheme itself proves effective, exhibiting nearly perfect single‐photon purity, while the observed indistinguishability in the studied sample is limited by the influence of the inevitable high excitation powers on the semiconductor environment of the quantum dot.
Funder
Bundesministerium für Bildung und Forschung
HORIZON EUROPE Reforming and enhancing the European Research and Innovation system
Deutsche Forschungsgemeinschaft
Bayerisches Staatsministerium für Wissenschaft, Forschung und Kunst
Institute for Advanced Study, Technische Universität München
Subject
Electrical and Electronic Engineering,Computational Theory and Mathematics,Condensed Matter Physics,Mathematical Physics,Nuclear and High Energy Physics,Electronic, Optical and Magnetic Materials,Statistical and Nonlinear Physics