Integration of a GaAs-based nanomechanical phase shifter with quantum-dot single-photon sources
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915179365662720 |
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| author | Qvotrup, Celeste Wang, Ying Albrechtsen, Marcus Thomas, Rodrigo A. Liu, Zhe Scholz, Sven Ludwig, Arne Midolo, Leonardo |
| author_facet | Qvotrup, Celeste Wang, Ying Albrechtsen, Marcus Thomas, Rodrigo A. Liu, Zhe Scholz, Sven Ludwig, Arne Midolo, Leonardo |
| contents | We demonstrate a small-footprint electromechanical phase shifter with a compact active length of $10\:μ\text{m}$ fabricated on a suspended GaAs membrane, offering versatile integration with quantum-dot single-photon sources. The phase shifter is based on a slot-mode waveguide, whose slot width can be controlled by electrostatic forces, enabling a large effective refractive index change $Δn_\text{eff} > 0.1$. We observe up to 3$π$ phase modulation with 10.6 \text{V} applied bias, and a figure of merit $V_πL = 5.7\cdot 10^{-3} \text{V}\cdot \text{cm}$. Integration with a Mach-Zehnder interferometer (MZI) further allows routing of single photons with up to 24 \text{dB} extinction ratio at cryogenic temperatures. This device enables advanced manipulation of quantum emitters and the realization of reconfigurable quantum photonic integrated circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01012 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Integration of a GaAs-based nanomechanical phase shifter with quantum-dot single-photon sources Qvotrup, Celeste Wang, Ying Albrechtsen, Marcus Thomas, Rodrigo A. Liu, Zhe Scholz, Sven Ludwig, Arne Midolo, Leonardo Quantum Physics We demonstrate a small-footprint electromechanical phase shifter with a compact active length of $10\:μ\text{m}$ fabricated on a suspended GaAs membrane, offering versatile integration with quantum-dot single-photon sources. The phase shifter is based on a slot-mode waveguide, whose slot width can be controlled by electrostatic forces, enabling a large effective refractive index change $Δn_\text{eff} > 0.1$. We observe up to 3$π$ phase modulation with 10.6 \text{V} applied bias, and a figure of merit $V_πL = 5.7\cdot 10^{-3} \text{V}\cdot \text{cm}$. Integration with a Mach-Zehnder interferometer (MZI) further allows routing of single photons with up to 24 \text{dB} extinction ratio at cryogenic temperatures. This device enables advanced manipulation of quantum emitters and the realization of reconfigurable quantum photonic integrated circuits. |
| title | Integration of a GaAs-based nanomechanical phase shifter with quantum-dot single-photon sources |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.01012 |