Research output per year
Research output per year
Personal profile
Research Interests
I'm working to develop quantum information devices using rare earth ions in crystals, including quantum memories, quantum repeaters, quantum transducers and optical quantum processors. I study the optical and spin properties of the rare earth ions with high-resolution optical spectroscopy, with a focus on high concentration crystals and on interactions between the rare earth ions. I aim to determine how material properties affect the performance of devices such as quantum memories, and to use this information to improve device performance.
Education/Academic qualification
Physics, PhD, Evaluation of a stoichiometric rare earth crystal for quantum computing, Research School of Physics
Award Date: 10 Dec 2013
Research student supervision
- Registered to supervise
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Collaborations and top research areas from the last five years
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Effect of a hybrid transition moment on Stark-modulated photon echoes in Er3+: Y2SiO5
Ahlefeldt, R. L., Lyasota, A., Smith, J., Ren, J. & Sellars, M. J., 15 Nov 2023, In: Physical Review B. 108, 19, 195122.Research output: Contribution to journal › Article › peer-review
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Negative Refractive Index in Dielectric Crystals Containing Stoichiometric Rare-Earth Ions
Berrington, M. C., Sellars, M. J., Longdell, J. J., Rønnow, H. M., Vallabhapurapu, H. H., Adambukulam, C., Laucht, A. & Ahlefeldt, R. L., 18 Dec 2023, In: Advanced Optical Materials. 11, 24, 2301167.Research output: Contribution to journal › Article › peer-review
Open Access3 Citations (Scopus) -
Observing Er3+ Sites in Si with an in Situ Single-Photon Detector
Berkman, I. R., Lyasota, A., De Boo, G. G., Bartholomew, J. G., Johnson, B. C., McCallum, J. C., Xu, B. B., Xie, S., Ahlefeldt, R. L., Sellars, M. J., Yin, C. & Rogge, S., Jan 2023, In: Physical Review Applied. 19, 1, 014037.Research output: Contribution to journal › Article › peer-review
Open Access7 Citations (Scopus) -
Optimizing the efficiency of a quantum memory based on rephased amplified spontaneous emission
Duda, C. K., Ferguson, K. R., Ahlefeldt, R. L., Hedges, M. P. & Sellars, M. J., Mar 2023, In: Physical Review A. 107, 3, L030602.Research output: Contribution to journal › Article › peer-review
Open Access3 Citations (Scopus) -
Complete crystal-field calculation of Zeeman hyperfine splittings in europium
Smith, K. M., Reid, M. F., Sellars, M. J. & Ahlefeldt, R. L., 15 Mar 2022, In: Physical Review B. 105, 12, 125141.Research output: Contribution to journal › Article › peer-review
Open Access2 Citations (Scopus)
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Linking microwave and optical technologies for hybrid quantum networks
13/01/24 → 12/12/27
Project: Research
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Atom based quantum memory and machine learning
Buchler, B., Ahlefeldt, R., Close, J. D., Sellars, M. & Tranter, A.
3/03/23 → 31/12/23
Project: Research
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Technologies to Enable the Quantum Internet, part II
Sellars, M., Ahlefeldt, R. & Stuart, J.
13/02/23 → 30/06/23
Project: Research
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Atomic Scale Control over Quantum Materials
Ahlefeldt, R., Rogge, S., Bartholomew, J., Fuhrer, M., McCallum, J. C., Motta, N. & Sellars, M.
7/06/22 → 6/06/23
Project: Research