Advanced Diagnostics of Laser-Ion Doping for Quantum Materials and Qubit Synthesis

We report on recent advances in the diagnostic characterization of intense ion beam-driven doping for quantum materials, leveraging new datasets collected during recent beamtimes at PHELIX (GSI, Germany) and TITAN (JLF, LLNL). Using Thomson Parabola spectrometry, we obtained detailed ion spectra, enabling quantification of energy distributions and ion species delivered to silicon and diamond samples. For experiments at TITAN, we will complement these measurements with a streak camera diagnostics to resolve the temporal structure of ion induced heating, providing insight into the dynamics of laser-accelerated ion implantation [1, 2]. We will correlate these diagnostics with post-irradiation analysis of color center formation for quantum computing applications and with superconducting phase emergence in boron-doped diamond. By combining time-resolved and energy-resolved diagnostics, we hope to be able to directly relate shot-to-shot variations in ion beam parameters to the efficiency of qubit and superconducting structure formation in highly boron doped diamond. This integrated approach informs process optimization strategies for tailoring material properties via intense ion beams. Future work will focus on further refining diagnostic capabilities and exploring the parameter space for maximizing desired sample outcomes [3].

[1] Redjem, et al., Commun Mater 4, 22 (2023), https://doi.org/10.1038/s43246-023-00349-4

[2] W. Liu, et al., https://arxiv.org/abs/2403.03570

[3] Jhuria, K., et al., Nat Commun 15, 4497 (2024), https://doi.org/10.1038/s41467-024-48714-2