Observation of composite gap solitons in optically induced nonlinear lattices in LiNbO3:Fe crystal

Abstract

We observe experimentally, the first time to our knowledge, two types of composite gap solitons in optically induced one-dimensional nonlinear lattice in LiNbO(3) crystal. We observe the staggered bright composite gap soliton when a single Gauss probe beam is incident at Bragg angle as well as a dipole probe beam is incident at normal incidence. When a single Gauss beam is at normal incidence, the in-phase bright composite gap solitons are observed.

Gap solitons in optically induced two-dimensional square photonic lattices in LiNbO3:Fe crystals

“…͓DOI: 10.1063/1.2793629͔ Discrete or gap solitons ͑GSs͒ have been intensively studied in one-or two-dimensional ͑2D͒ photonic lattice ͑PL͒. [1][2][3][4][5][6][7] Light propagation in the PL is mainly governed by the interplay between the tunneling between adjacent waveguides and the nonlinearity. A balance between these two effects results in self-localized states or GSs.…”

Anomalous Photodeposition of Ag on Ferroelectric Surfaces with Below‐Bandgap Excitation

“…[ 26 ] Uniquely, for periodically poled LNO crystals, photochemical reduction can result in the formation of nanowires that form along the domain wall [ 18 ] or within domains. [31][32][33] Photorefractive ferroelectrics are known to support spatial solitons, i.e. [10][11][12][13][14][15][16][17][18][19]27 ] The photodeposition is contingent on the production and diffusion of electrons through the photogalvanic process which can only occur with super bandgap illumination energies.…”

Discrete diffraction of light in optically induced bulk and planar photonic superlattices in photorefractive lithium niobate

“…The subsequent experimental studies have convincingly demonstrated the advantages of the given approach. Along with the SBN crystals, LiNbO 3 doped with some impurities (for example, Fe and Cu ions) is promising for obtaining optically-induced nonlinear waveguide structures [7][8][9]. The photorefractive optical nonlinearity of LiNbO 3 is caused by the photovoltaic effect, and its nonlinear response can be observed without application of external electric fields, as in the case of SBN.…”

“…By this method, it is possible to produce waveguide optical structures with a required topology in bulk samples and planar optical waveguides [7,8,12]. The standard holographic technology allows only harmonic modulation of the refractive index of the medium to be obtained.…”