Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulses
Nanoscale bright sources that produce high-purity single photons and high-fidelity entangled photon pairs are the building blocks to realize high security quantum communication devices. To achieve high communication rates, it is desirable to have an ensemble of quantum emitters that can be collectiv...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Materials for Quantum Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2633-4356/acd7c1 |
| _version_ | 1827092701639606272 |
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| author | Florian Kappe Yusuf Karli Thomas K Bracht Saimon Filipe Covre da Silva Tim Seidelmann Vollrath Martin Axt Armando Rastelli Gregor Weihs Doris E Reiter Vikas Remesh |
| author_facet | Florian Kappe Yusuf Karli Thomas K Bracht Saimon Filipe Covre da Silva Tim Seidelmann Vollrath Martin Axt Armando Rastelli Gregor Weihs Doris E Reiter Vikas Remesh |
| author_sort | Florian Kappe |
| collection | DOAJ |
| description | Nanoscale bright sources that produce high-purity single photons and high-fidelity entangled photon pairs are the building blocks to realize high security quantum communication devices. To achieve high communication rates, it is desirable to have an ensemble of quantum emitters that can be collectively excited, despite their spectral variability. In case of semiconductor quantum dots, Rabi rotations are the most popular method for resonant excitation. However, these cannot assure a universal, highly efficient excited state preparation, due to the sensitivity to excitation parameters. In contrast, adiabatic rapid passage (ARP), relying on chirped optical pulses, is immune to quantum dot spectral inhomogeneity. Here, we show that the robustness of ARP holds true for the simultaneous excitation of the biexciton states in multiple, spatially separated and spectrally different quantum dots. For positive chirps, we also find a regime where the influence of phonons relax the sensitivity to spectral detunings and lower the needed excitation power. Being able to generate high-purity photons from spatially multiplexed quantum dot sources using the biexciton to ground state cascade is a big step towards the implementation of high photon rate, entanglement-based quantum key distribution protocols. |
| first_indexed | 2024-03-13T07:52:21Z |
| format | Article |
| id | doaj.art-b965fcdf43a14e289f7fdf986039c47e |
| institution | Directory Open Access Journal |
| issn | 2633-4356 |
| language | English |
| last_indexed | 2025-03-20T06:16:23Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials for Quantum Technology |
| spelling | doaj.art-b965fcdf43a14e289f7fdf986039c47e2024-10-02T17:22:57ZengIOP PublishingMaterials for Quantum Technology2633-43562023-01-013202500610.1088/2633-4356/acd7c1Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulsesFlorian Kappe0https://orcid.org/0000-0001-6996-8405Yusuf Karli1https://orcid.org/0000-0001-8987-828XThomas K Bracht2https://orcid.org/0000-0001-7249-6226Saimon Filipe Covre da Silva3https://orcid.org/0000-0003-4977-1933Tim Seidelmann4https://orcid.org/0000-0003-0588-3212Vollrath Martin Axt5Armando Rastelli6https://orcid.org/0000-0002-1343-4962Gregor Weihs7https://orcid.org/0000-0003-2260-3008Doris E Reiter8https://orcid.org/0000-0002-3648-353XVikas Remesh9https://orcid.org/0000-0003-2029-0570Institut für Experimentalphysik, Universität Innsbruck , Innsbruck 6020, AustriaInstitut für Experimentalphysik, Universität Innsbruck , Innsbruck 6020, AustriaCondensed Matter Theory, Department of Physics, TU Dortmund , Dortmund 44221, Germany; Institut für Festkörpertheorie, Universität Münster , Münster 48149, GermanyInstitute of Semiconductor and Solid State Physics, Johannes Kepler University Linz , Linz 4040, AustriaTheoretische Physik III, Universität Bayreuth , Bayreuth 95440, GermanyTheoretische Physik III, Universität Bayreuth , Bayreuth 95440, GermanyInstitute of Semiconductor and Solid State Physics, Johannes Kepler University Linz , Linz 4040, AustriaInstitut für Experimentalphysik, Universität Innsbruck , Innsbruck 6020, AustriaCondensed Matter Theory, Department of Physics, TU Dortmund , Dortmund 44221, GermanyInstitut für Experimentalphysik, Universität Innsbruck , Innsbruck 6020, AustriaNanoscale bright sources that produce high-purity single photons and high-fidelity entangled photon pairs are the building blocks to realize high security quantum communication devices. To achieve high communication rates, it is desirable to have an ensemble of quantum emitters that can be collectively excited, despite their spectral variability. In case of semiconductor quantum dots, Rabi rotations are the most popular method for resonant excitation. However, these cannot assure a universal, highly efficient excited state preparation, due to the sensitivity to excitation parameters. In contrast, adiabatic rapid passage (ARP), relying on chirped optical pulses, is immune to quantum dot spectral inhomogeneity. Here, we show that the robustness of ARP holds true for the simultaneous excitation of the biexciton states in multiple, spatially separated and spectrally different quantum dots. For positive chirps, we also find a regime where the influence of phonons relax the sensitivity to spectral detunings and lower the needed excitation power. Being able to generate high-purity photons from spatially multiplexed quantum dot sources using the biexciton to ground state cascade is a big step towards the implementation of high photon rate, entanglement-based quantum key distribution protocols.https://doi.org/10.1088/2633-4356/acd7c1quantum dotselectron–phonon interactionchirped pulses |
| spellingShingle | Florian Kappe Yusuf Karli Thomas K Bracht Saimon Filipe Covre da Silva Tim Seidelmann Vollrath Martin Axt Armando Rastelli Gregor Weihs Doris E Reiter Vikas Remesh Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulses Materials for Quantum Technology quantum dots electron–phonon interaction chirped pulses |
| title | Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulses |
| title_full | Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulses |
| title_fullStr | Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulses |
| title_full_unstemmed | Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulses |
| title_short | Collective excitation of spatio-spectrally distinct quantum dots enabled by chirped pulses |
| title_sort | collective excitation of spatio spectrally distinct quantum dots enabled by chirped pulses |
| topic | quantum dots electron–phonon interaction chirped pulses |
| url | https://doi.org/10.1088/2633-4356/acd7c1 |
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