I investigate the world of quantum mechanics and how we can use quantum properties in new technologies. I am interested in the intersection of the quantum world - which ultimately governs everything at the smallest scales - with the classical world we experience. My research focusses on the experimental and theoretical study and applications of quantum transport in semiconductors, but I am also pursuing novel materials including molecular and hybrid semiconductors. Specifically, I am working towards development of single electron state preparation and manipulation in semiconductors and related materials for use in quantum computation, quantum sensing and quantum metrology.
I have lived on 3 continents.
LO-phonon emission rate of hot electrons from an on-demand single-electron source in a GaAs/AlGaAs heterostructure; N. Johnson, C. Emary, S. Ryu, H.-S. Sim, P. See, J. D. Fletcher, J. P. Griffiths, G. A. C. Jones, I. Farrer, D. A. Ritchie, M. Pepper, T. J. B. M. Janssen, M. Kataoka; Phys. Rev. Lett. 121 137703 2018; arXiv:1712.09031
Measurement of the curvature and height of the potential barrier for a dynamic quantum dot; N. Johnson, G. Yamahata, A. Fujiwara; Appl. Phys. Lett. 115 162103 2019; arXiv 1907.08445
Picosecond coherent electron motion in a silicon single-electron source; G. Yamahata, S. Ryu, N. Johnson, H.-S. Sim, A. Fujiwara, M. Kataoka; Nat. Nanotech. 14 1019 2019; arXiv 1903.07802
Continuous-variable tomography of solitary electrons
J. D. Fletcher, N. Johnson, E. Locane, P. See, J. P. Griffiths, I. Farrer, D. A. Ritchie, P. W. Brouwer, V. Kashcheyevs, M. Kataoka; Nat. Commun. 10 5298 2019; arXiv 1901.10985
UCL RPS: https://iris.ucl.ac.uk/iris/browse/profile?upi=NLJOH33]