Klein tunneling of light in waveguide superlattices
Institute for Applied Physics, Friedrich-Schiller-Universität Jena - Max-Wien-Platz 1, D-07743 Jena, Germany, EU
2 Dipartimento di Fisica, Politecnico di Milano - Piazza L. da Vinci 32, I-20133 Milano, Italy, EU
Accepted: 25 November 2011
We present an experimental observation of Klein tunneling of light waves in lattices of evanescently coupled waveguides with a superimposed potential step. The incident wave packet “mass” which is a characteristic feature of Klein tunneling is generated by a minigap in the band structure of the lattice. We studied different masses and measured the tunneling rates across the potential step.
PACS: 03.65.Pm – Relativistic wave equations / 03.65.Xp – Tunneling, traversal time, quantum Zeno dynamics / 42.82.Et – Waveguides, couplers, and arrays
© EPLA, 2012