Zener tunneling of light waves in an optical superlattice

Year: 2005

Authors: Ghulinyan M., Oton CJ., Gaburro Z., Pavesi L., Toninelli C., Wiersma D.

Autors Affiliation: Univ Trent, Dept Phys, I-38050 Trento, Italy; INFM, I-38050 Trento, Italy;
European Lab Nonlinear Spect, I-50019 Florence,
Italy;
INFM MATIS, I-50019 Florence, Italy

Abstract: We report on the observation of Zener tunneling of light waves in spectral and time-resolved transmission measurements, performed on an optical superlattice made of porous silicon. The structure was designed to have two photonic minibands, spaced by a narrow frequency gap. A gradient in the refractive index was introduced to create two optical Wannier-Stark ladders and, at a critical value of the optical gradient, tunneling between energy bands was observed in the form of an enhanced transmission peak and a characteristic time dependence of he transmission.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 94 (12)      Pages from: 127401-1  to: 127401-4

KeyWords: semiconductor superlattices; induced delocalization; bloch oscillations; stark-ladder; breakdown

Citations: 72
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