Previous work has included studies of large three-dimensional arrays of laser-written NV- in diamond (below) and building a low-temperature confocal microscope for sensing with nanodiamonds.
 Y. C. Chen, P. S. Salter, S. Knauer, L. Weng, A. C. Frangeskou, C. J. Stephen, S. N. Ishmael, P. R. Dolan, S. Johnson, B. L. Green, G. W. Morley, M. E. Newton, J. G. Rarity, M. J. Booth, and J. M. Smith, “Laser writing of coherent colour centres in diamond”, Nat. Photonics 11, 77–80 (2016).
 C. J. Stephen, B. L. Green, Y. N. D. Lekhai, L. Weng, P. Hill, S. Johnson, A. C. Frangeskou, P. L. Diggle, Y. C. Chen, M. J. Strain, E. Gu, M. E. Newton, J. M. Smith, P. S. Salter, and G. W. Morley, “Deep Three-Dimensional Solid-State Qubit Arrays with Long-Lived Spin Coherence”, Phys. Rev. Appl. 12, 064005 (2019).
 Y. C. Chen, B. Griffiths, L. Weng, S. S. Nicley, S. N. Ishmael, Y. N. D. Lekhai, S. Johnson, C. J. Stephen, B. L. Green, G. W. Morley, M. E. Newton, M. J. Booth, P. S. Salter, and J. M. Smith, “Laser writing of individual nitrogen-vacancy defects in diamond with near-unity yield”, Optica 6, 662 (2019).