Fabrication of three-dimensional microdisk resonators in calcium fluoride by femtosecond laser micromachining

  • Jintian Lin
  • , Yingxin Xu
  • , Jialei Tang
  • , Nengwen Wang
  • , Jiangxin Song
  • , Fei He
  • , Wei Fang
  • , Ya Cheng*
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We report on fabrication of on-chip calcium fluoride (CaF2) microdisk resonators using water-assisted femtosecond laser micromachining. Focused ion beam (FIB) milling is used to create ultra-smooth sidewalls. The quality (Q) factors of the fabricated microresonators are measured to be 4.2 × 104 at wavelengths near 1,550 nm. The Q factor is mainly limited by the scattering from the bottom surface of the disk whose roughness remains high due to the femtosecond laser micromachining process. This technique facilitates the formation of on-chip microresonators on various kinds of bulk crystalline materials, which can benefit a wide range of applications such as nonlinear optics, quantum optics, and chip-level integration of photonic devices.

Original languageEnglish
Pages (from-to)2019-2023
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume116
Issue number4
DOIs
StatePublished - Sep 2014
Externally publishedYes

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