Nanofibers with Bragg gratings from equidistant holes

Abstract

We study nanofibers with Bragg gratings from equidistant holes. We calculate analytically and numerically the reflection and transmission coefficients for a single grating and also for a cavity formed by two gratings. We show that the reflection and transmission coefficients of the gratings substantially depend on the number of holes, the hole length, the hole depth, the grating period, and the light wavelength. We find that the reflection and transmission coefficients of the gratings depend on the orientation of the polarization vector of light with respect to the holes. Such a dependence is a result of the fact that the cross-section of the gratings is not cylindrically symmetric.

Keywords:

• nanofiber
• fiber Bragg grating
• nanofiber cavity
• array of holes
• reflection and transmission
• polarization dependence

Acknowledgements

We are thankful to M. Morinaga for fruitful discussions. This work was supported by the Japan Science and Technology Agency as one of the Strategic Innovation projects.