Observation of dipolar transport in one-dimensional photonic lattices

2016/07/28 by Cantillano, Camilo, Morales-Inostroza, Luis, Real, Bastián +4 · 4 citations
#FOS: Physical sciences #Optics (physics.optics)

paper · doi:10.48550/arxiv.1607.08575

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.

Cited by

• Line lasing in a two-dimensional lattice of orbital photonic resonators
• Long-range evanescent coupling through photonic molecules
• Continuum Landau surface states in a non-Hermitian Weyl semimetal
• Observation of multi-orbital Fano resonances in photonic lattices

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