Propagation of Bessel-X pulses in a hybrid photonic crystal

Abstract

We report the propagation of Bessel-X pulses in a two-dimensional hybrid photonic crystal, investigated by the finite-difference time-domain method, in which broadband super-collimation and the propagation of self-collimated ultrashort pulses were reported. We first show the propagation of Bessel-X pulses in two-dimensional free space, whose transverse branches diverge rapidly with propagation. We then show that Bessel-X pulses propagate with their transverse and longitudinal shapes almost unchanged in the hybrid photonic crystal.

Keywords:

• Diffraction and gratings
• photonic crystals
• wave propagation
• physical optics

Acknowledgements

The author acknowledges S. G. Johnson of MIT and his co-workers who have made Meep freely available to the research community.

Notes

No potential conflict of interest was reported by the author.

Additional information

Funding

This work was supported by the 2017 Hongik University Research Fund.