Femtosecond laser written diamond waveguides

A step towards integrated photonics in the far infrared

Vibhav Bharadwaj*, Yuchen Wang, Toney Teddy Fernandez, Roberta Ramponi, Shane M. Eaton, Gianluca Galzerano

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)


A first demonstration and complete characterization of mid-infrared waveguides in single crystal diamond are reported. Waveguides were designed for 2.4 μm and 8.6 μm waveguiding, with their group velocity dispersion analyzed using femtosecond pulses at 2.4 μm wavelength propagated through the waveguide and the bulk substrate. The total dispersion was found to be dominated by the bulk material rather than the waveguide, and was on the range of 275 fs2/mm, demonstrating that femtosecond laser written modifications in diamond introduce negligible perturbations to the pristine material.

Original languageEnglish
Pages (from-to)183-185
Number of pages3
JournalOptical Materials
Publication statusPublished - 1 Nov 2018
Externally publishedYes


  • Diamond machining
  • Diamond photonics
  • Femtosecond phenomena
  • Laser materials processing
  • Mid- and far-infrared photonics

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