Photonic crystal formation on optical nanofibers using femtosecond laser ablation technique.

@article{Nayak2013PhotonicCF,
  title={Photonic crystal formation on optical nanofibers using femtosecond laser ablation technique.},
  author={Kali Prasanna Nayak and Kohzo Hakuta},
  journal={Optics express},
  year={2013},
  volume={21 2},
  pages={2480-90}
}
We demonstrate that thousands of periodic nano-craters are fabricated on a subwavelength-diameter tapered optical fiber, an optical nanofiber, by irradiating with just a single femtosecond laser pulse. A key aspect of the fabrication is that the nanofiber itself acts as a cylindrical lens and focuses the femtosecond laser beam on its shadow surface. We also demonstrate that the periodic nano-crater array on the nanofiber shows polarization dependent fiber Bragg grating (FBG) characteristics… CONTINUE READING