Observation of dipolar transport in one-dimensional photonic lattices

Camilo Cantillano; Luis Morales-Inostroza; Bastián Real; Santiago Rojas-Rojas; Aldo Delgado; Alexander Szameit; Rodrigo A. Vicencio

arXiv · 1607.08575

Observation of dipolar transport in one-dimensional photonic lattices

Camilo Cantillano·Luis Morales-Inostroza·Bastián Real·Santiago Rojas-Rojas·Aldo Delgado·Alexander Szameit·Rodrigo A. Vicencio

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Abstract

We experimentally study the transport prop- erties of dipolar and fundamental modes on one di- mensional (1D) coupled waveguide arrays. By carefully modulating a wide optical beam, we are able to effec- tively excite dipolar or fundamental modes to study discrete diffraction (single-site excitation) and gaussian beam propagation (multi-site excitation plus a phase gradient). We observe that dipolar modes experience a larger spreading area due to an effective larger coupling constant, which is found to be more than two times larger than the one for fundamental modes. Addition- ally, we study the effect of non-diagonal disorder and find that while fundamental modes are already trapped on a weakly disorder array, dipoles are still able to prop- agate across the system.

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Camilo Cantillano, Luis Morales-Inostroza, Bastián Real, Santiago Rojas-Rojas, Aldo Delgado, Alexander Szameit, Rodrigo A. Vicencio. 2016-07-28. Observation of dipolar transport in one-dimensional photonic lattices. https://arxiv.org/abs/1607.08575

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