Optical microcomponents

Specifications in a nutshell:

  • Optical microcavities with sub-nanometer roughness
  • High degree of reproducibility
  • Finesse exceeding 10,000
  • Radii of curvature from 500 microns down to a single micron
  • Precision engineering in positioning, shapes, and arrangement for demanding applications
  • Custom fabrication including non-spherical forms, waveguides and lattices
  • We can supply components either coated or uncoated


Our unique expertise

Our core expertise in focused ion beam milling (FIB) offers a high degree of topographic control of conductive and non-conductive materials such as optical glasses, enabling the fabrication of open microcavities with sub-nanometer roughness.

Once coated with high-reflectivity dielectric Bragg reflectors, our substrates are routinely used as open microcavities providing high finesse >104 and mode volume as low as a few cubic wavelengths (λ3).


The success of our FIB-fabricated open microcavities is based on the intrinsic capability to tune the optical mode both spectrally and spatially, a key enabler to engineering light-matter interactions to a high-degree over an almost unlimited range of materials. 

Our open microcavities have received tremendous interest in the nanophotonics community, demonstrated by more than 20 academic publications in peer-reviewed journals, including:

S. Dufferwiel, et al., “Valley-addressable polaritons in atomically thin semiconductors”, Nature Photonics (2017)

A. Trichet, et al., “Nanoparticle trapping and characterisation using open microcavities”, Nano Letters (2016)

S. Dufferwiel, et al., “Spin textures of exciton-polaritons in a tunable microcavity with large TE-TM splitting”, Physical Review Letters (2015)

S. Johnson, et al., “Tunable cavity coupling of the zero phonon line of a nitrogen-vacancy defect in diamond”, New Journal of Physics (2015)


Our pricing and delivery are competitive – please talk to us:

Email: contact@oxfordhighq.com

Telephone: +44 (0)1865 309613