Speaker
Description
Sources of single and entangled photons are needed for many areas of quantum photonics, including quantum computation, cryptography, and sensing. Solid-state emitters that may be triggered on-demand are especially promising for long-term scalability and integration with classical communication hardware. Over the past decade, our research group has been developing laser triggering schemes for quantum emitters that ultilize pulse shaping to engineer the light-matter interaction [1-5]. By exploiting amplitude and phase control, we have implemented triggering protocols that are robust to variations in the laser pulse parameters and the optical properties of the emitters themselves [1,3], facilitating commercial implementation using solid-state systems. We have also shown that shaping eases the technical complexity associated with multiplexing in quantum optical systems [5,6] and enables several performance metrics of quantum emitters (brightness, indistinguishability, purity) to be optimized simultaneously [4]. In this presentation, I will highlight our recent experiments pursuing the implementation of our triggering scheme Notch-filtered Adiabatic Rapid Passage (NARP) [4] in single semiconductor quantum dots, including InGaAs quantum dots in planar heterostructures, and InAsP quantum dots in nanowire waveguides.
[1] R. Mathew et al., “Subpicosecond adiabatic rapid passage on a single semiconductor quantum dot: phonon-mediated dephasing in the strong-driving regime”, Phys. Rev. B 90, 035316, 2014.
[2] A. Ramachandran et al., Suppression of decoherence tied to electron–phonon coupling in telecom-compatible quantum dots: low-threshold reappearance regime for quantum state inversion, Optics Letters, 45, 6498 (2020).
[3] A. Ramachandran et al., Experimental quantification of the robustness of adiabatic rapid passage for quantum state inversion in semiconductor quantum dots. Optics Express, 29, 41766 (2021).
[4] G. R. Wilbur et al., “Notch-filtered Adiabatic Rapid Passage for optically driven quantum light sources”, APL Photonics 7, 111302, 2022.
[5] A. Ramachandran et al., “Robust parallel driving of quantum dots for multiplexing of quantum light sources”, Sci. Rep. 14:5356, 2024.
[6] A. Binai Motlagh, et al., “Multi-NARP Laser Driving Scheme for Multiplexed Quantum Networks”, Optica Quantum 3, 461 (2025).
| Keyword-1 | single photon source |
|---|---|
| Keyword-2 | femtosecond pulse shaping |
| Keyword-3 | quantum control |