Details
| Original language | English |
|---|---|
| Article number | 015244 |
| Number of pages | 9 |
| Journal | AIP Advances |
| Volume | 14 |
| Issue number | 1 |
| Early online date | 25 Jan 2024 |
| Publication status | Published - Jan 2024 |
Abstract
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.
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In: AIP Advances, Vol. 14, No. 1, 015244, 01.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources
AU - Schmidt, Constantin
AU - Ma, Chenxi
AU - Benthin, Frederik
AU - Yang, Jingzhong
AU - Rugeramigabo, Eddy P.
AU - Zopf, Michael
AU - Ding, Fei
N1 - Funding Information: The authors gratefully acknowledge the funding by the German Federal Ministry of Education and Research (BMBF) within the projects QR.X (Grant No. 16KISQ015) and SemIQON (Grant No. 13N16291), the European Research Council (Grant No. QD-NOMS GA715770), the German Research Foundation under Germany’s Excellence Strategy—Grant No. EXC-2123, and Quantum Frontiers—Grant Nos. 390837967 and 45463526. The publication of this article was funded by the Open Access Publishing Fund of Leibniz Universität Hannover.
PY - 2024/1
Y1 - 2024/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85183991973&partnerID=8YFLogxK
U2 - 10.1063/5.0160086
DO - 10.1063/5.0160086
M3 - Article
AN - SCOPUS:85183991973
VL - 14
JO - AIP Advances
JF - AIP Advances
SN - 2158-3226
IS - 1
M1 - 015244
ER -