Photorefractive writing and probing of anisotropic linear and non-linear lattices

Abstract

We study experimentally the writing of one- and two-dimensional photorefractive lattices, focusing on the often overlooked transient regime. Our measurements agree well with theory, in particular concerning the ratio of the drift to diffusion terms. We then study the transverse dynamics of coherent waves propagating in the lattices, in a few novel and simple configurations. For focused linear waves with broad transverse spectrum, we remark that both the intensity distributions in real space ("discrete diffraction") and Fourier space ("Brillouin zone spectroscopy") reflect the Bragg planes and band structure. For non-linear waves, we observe modulational instability and discrete solitons formation in time domain. We discuss also the non-ideal effects inherent to the photo-induction technique : anisotropy, residual nonlinearity, diffusive term, non-stationarity.

arXiv comment10 pages, 8 figures

References in corpus (8)

• Observation of discrete vortex solitons in optically-induced photonic lattices
• Modulation Instability and Pattern Formation in Spatially Incoherent Light Beams
• Discrete solitons and soliton-induced dislocations in partially-coherent photonic lattices
• Brillouin-zone spectroscopy of nonlinear photonic lattices
• Structure analysis of two-dimensional nonlinear self-trapped photonic lattices in anisotropic photorefractive media
• Analysis of transverse Anderson localization in refractive index structures with customized random potential
• Two dimensional modulational instability in photorefractive media
• Absolute calibration of the refractive index in photo-induced photonic lattices

Cited by in corpus (2)

• Spatial rogue waves in photorefractive SBN crystals
• Deep learning-based classification of high intensity patterns in photorefractive crystals