Staff Profile

My interests are surrounding experimental photonics, especially telecoms range characterization of fibre devices, fibre based device manufacture, numerical modeling and software programming with Python. With an increasing interest in open-source projects including Python and the FDTD software MEEP. 

I previously worked with Prof Noel Healy on my PhD titled "Perovskite Whispering Gallery Mode Resonators" here at Newcastle University where we developed ultra-high quality factor cylindrical micro-resonators with a perovskite single-crystal filling. I will be defending my thesis in the near future.

I previously worked with Dr Victor Pacheco Pena working with metamaterials for linear computing. Including the study of perfect splitting in rectangular waveguides and the modelling of photonic crystal waveguide junctions.

I currently work with Prof Noel Healy where we will be examining highly nonlinear perovskite based fiber based devices.

• Articles

  • Johnson-Richards C, Yakovlev A, Pacheco-Peña V. Topological Valley Photonic Waveguides: Scattering Matrix Evaluation for Linear Computing. Advanced Photonics Research 2025, 6(11), e202500006.
  • Rogers W, Johnson-Richards C, Yakovlev A, Pacheco-Pena V. Perfect splitting in rectangular-waveguide junctions for analog computing. Physical Review Applied 2024, 21(5), 054054.

• Conference Proceedings (inc. Abstracts)

  • Johnson-Richards C, Macdonald RG, Yakovlev A, Pacheco-Pena V. Photonic Routing in a Multiple-Input Valley Photonic Crystal Junction. In: International Conference on Metamaterials, Photonic Crystals and Plasmonics META 2025. 2025, Malaga, Spain: META Conference.
  • Rogers William, Johnson-Richards C, Yakovlev A, Pacheco-Peña V. Enabling perfect splitting using four-port interconnected rectangular waveguides. In: XXXV URSI General Assembly and Scientific Symposium – URSI GASS 2023. 2023, Sapporo, Japan: URSI GASS.