Table of Contents
Physics Research International
Volume 2010 (2010), Article ID 645106, 5 pages
Research Article

Klein Tunneling of Light in Fiber Bragg Gratings

Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy

Received 28 May 2010; Accepted 29 July 2010

Academic Editor: Lorenzo Pavesi

Copyright © 2010 Stefano Longhi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A photonic analogue of Klein tunneling (KT), that is, of the exotic property of relativistic electrons to pass a large repulsive and sharp potential step, is proposed for pulse propagation in a nonuniform fiber Bragg grating with an embedded chirped region. KT can be simply observed as the opening of a transmission window inside the grating stop band, provided that the impressed chirp is realized over a length of the order of the analogue of the Compton wavelength.