| Issue |
EPL
Volume 97, Number 1, February 2012
|
|
|---|---|---|
| Article Number | 10008 | |
| Number of page(s) | 6 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/97/10008 | |
| Published online | 03 January 2012 | |
Klein tunneling of light in waveguide superlattices
1
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
Received:
21
September
2011
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
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