High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources
The on-chip integration of single photon and entangled photon emitters such as epitaxially grown semiconductor quantum dots into photonic frameworks is a rapidly evolving research field. GaAs quantum dots offer high purity and a high degree of entanglement due to, in part, exhibiting very small fine...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-01-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0160086 |
| _version_ | 1797331942017859584 |
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| author | Constantin Schmidt Chenxi Ma Frederik Benthin Jingzhong Yang Eddy P. Rugeramigabo Michael Zopf Fei Ding |
| author_facet | Constantin Schmidt Chenxi Ma Frederik Benthin Jingzhong Yang Eddy P. Rugeramigabo Michael Zopf Fei Ding |
| author_sort | Constantin Schmidt |
| collection | DOAJ |
| description | The on-chip integration of single photon and entangled photon emitters such as epitaxially grown semiconductor quantum dots into photonic frameworks is a rapidly evolving research field. GaAs quantum dots offer high purity and a high degree of entanglement due to, in part, exhibiting very small fine structure splitting along with short radiative lifetimes. Integrating strain-tunable quantum dots into nanostructures enhances the quantum optical fingerprint, i.e., radiative lifetimes and coupling of these sources, and allows for on-chip manipulation and routing of the generated quantum states of light. Efficient out-coupling of photons for off-chip processing and detection requires carefully engineered mesoscopic structures. Here, we present numerical studies of highly efficient grating couplers reaching up to over 90% transmission. A 2D Gaussian mode overlap of 83.39% for enhanced out-coupling of light from within strain-tunable photonic nanostructures for free-space transmission and single-mode fiber coupling is shown. The photon wavelength under consideration is 780 nm, corresponding to the emission from GaAs quantum dots resembling the 87Rb D2 line. The presented numerical study helps implement such sources for applications in complex quantum optical networks. |
| first_indexed | 2024-03-08T07:42:35Z |
| format | Article |
| id | doaj.art-060233e5a3304396b35c320871727ca6 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-08T07:42:35Z |
| publishDate | 2024-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-060233e5a3304396b35c320871727ca62024-02-02T16:46:07ZengAIP Publishing LLCAIP Advances2158-32262024-01-01141015244015244-810.1063/5.0160086High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sourcesConstantin Schmidt0Chenxi Ma1Frederik Benthin2Jingzhong Yang3Eddy P. Rugeramigabo4Michael Zopf5Fei Ding6Institut für Festkörperphysik, Gottfried Wilhelm Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, GermanyInstitut für Festkörperphysik, Gottfried Wilhelm Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, GermanyInstitut für Festkörperphysik, Gottfried Wilhelm Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, GermanyInstitut für Festkörperphysik, Gottfried Wilhelm Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, GermanyInstitut für Festkörperphysik, Gottfried Wilhelm Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, GermanyInstitut für Festkörperphysik, Gottfried Wilhelm Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, GermanyInstitut für Festkörperphysik, Gottfried Wilhelm Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, GermanyThe on-chip integration of single photon and entangled photon emitters such as epitaxially grown semiconductor quantum dots into photonic frameworks is a rapidly evolving research field. GaAs quantum dots offer high purity and a high degree of entanglement due to, in part, exhibiting very small fine structure splitting along with short radiative lifetimes. Integrating strain-tunable quantum dots into nanostructures enhances the quantum optical fingerprint, i.e., radiative lifetimes and coupling of these sources, and allows for on-chip manipulation and routing of the generated quantum states of light. Efficient out-coupling of photons for off-chip processing and detection requires carefully engineered mesoscopic structures. Here, we present numerical studies of highly efficient grating couplers reaching up to over 90% transmission. A 2D Gaussian mode overlap of 83.39% for enhanced out-coupling of light from within strain-tunable photonic nanostructures for free-space transmission and single-mode fiber coupling is shown. The photon wavelength under consideration is 780 nm, corresponding to the emission from GaAs quantum dots resembling the 87Rb D2 line. The presented numerical study helps implement such sources for applications in complex quantum optical networks.http://dx.doi.org/10.1063/5.0160086 |
| spellingShingle | Constantin Schmidt Chenxi Ma Frederik Benthin Jingzhong Yang Eddy P. Rugeramigabo Michael Zopf Fei Ding High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources AIP Advances |
| title | High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources |
| title_full | High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources |
| title_fullStr | High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources |
| title_full_unstemmed | High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources |
| title_short | High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources |
| title_sort | high efficiency grating couplers for strain tunable gaas quantum dot based entangled photon sources |
| url | http://dx.doi.org/10.1063/5.0160086 |
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