Free-standing silicon nitride nanobeams with an efficient fiber-chip interface for cavity QED Academic Article uri icon


  • We present the design, fabrication and characterization of high quality factor silicon nitride nanobeam PhC cavities at visible wavelengths for coupling to diamond color centers in a cavity QED system. We demonstrate devices with a quality factor of about 24;000 around the zero-phonon line of the germanium-vacancy center in diamond. We also present an efficient fiber-to-waveguide coupling platform for suspended nanophotonics. By gently changing the corresponding effective indices at the fiber-waveguide interface, we achieve an efficiency of about 96% at the cavity resonance.

author list (cited authors)

  • Alajlan, A., Khurana, M., Liu, X., Cojocaru, I., & Akimov, A. V.

complete list of authors

  • Alajlan, Abdulrahman||Khurana, Mohit||Liu, Xiaohan||Cojocaru, Ivan||Akimov, Alexey V

publication date

  • January 1, 2020 11:11 AM