C. Rüter

Quasi-one-dimensional photonic lattices and superlattices in lithium niobate: Linear and nonlinear discrete diffraction of light

The effects of linear and nonlinear light propagation in quasi-one-dimensional systems of coupled optical waveguides (photonic lattices and superlattices) obtained by projection optical induction in photorefractive lithium niobate samples have been experimentally studied and numerically simulated.

Linear and nonlinear light localization within photorefractive photonic superlattices in lithium niobate

Some features of discrete diffraction of light, which manifest themselves in the possibility of its linear and nonlinear localization in one or several waveguide elements, in photorefractive photonic superlattices optically induced in lithium niobate crystals, and in planar optical waveguides based on this material, have been experimentally investigated.

Observation of Parity-Time Symmetry in Optical Systems

Quantum information science continues to drive work in quantum optics. New research makes fundamental measurements showing parity-time symmetry breaking using an optical system.

Nonlinear localization of light within 1D photonic lattices and superlattices optically induced in photorefractive lithium niobate using projection technique

Spatial periodic modulation of a refractive index in photorefractive materials by light interference patterns may result in formation of 1D or 2D systems of coupled optical waveguides (photonic lattices or superlattices) which make possible nonlinear localization of light, e.g. some kinds of discrete spatial solitons [1, 2]. If the non-periodic waveguide systems are necessary, more complicated techniques should be used [3]. In this work, we study the features of a nonlinear diffraction of light within 1D waveguide structures optically induced in photorefractive bulk and planar waveguide samples of lithium niobate (LiNbO3) using projection technique.

Suppression of discrete diffraction within modulated one-dimensional photorefractive photonic lattices in lithium niobate

The linear and nonlinear discrete diffraction of light beams within one-dimensional optically induced modulated photonic lattices (MPL) in bulk photorefractive samples of lithium niobate (LiNbO3) are investigated. The linear transmission of MPL for different directions of light is studied. It is concluded that the discrete diffraction of light within optically induced photorefractive photonic lattices may be strongly modified and even completely suppressed due to their optical modulation.

Novel type of one-dimensional discrete vector solitons

Discrete vector solitons (DVS) are a special class of vector solitons which have been found to exist in discrete media such as, for example, nonlinear waveguide arrays. Individual components of such complex structure are unable to form stable localized structures on their own. In this contribution we explore the DVS in NWA with saturable nonlinearity in a special case in which the components of DVS have the same frequency but differ in polarization.