NONLINEAR OPTICAL EFFECTS IN MAGNETIC CRYSTALS

Optical pulse propagation in nonlinear photonic crystals.

We present a formalism for optical pulse propagation in nonlinear photonic crystals of arbitrary dimensionality. Using a multiple-scale analysis, we derive the dynamical nonlinear Schrödinger equation obeyed by the envelope function modulating an underlying Bloch function. Effective coefficients appear in that equation characterizing the effects of Kerr nonlinearity, linear gain or loss, and ma...

Spatial optical solitons in nonlinear photonic crystals.

We study spatial optical solitons in a one-dimensional nonlinear photonic crystal created by an array of thin-film nonlinear waveguides, the so-called Dirac-comb nonlinear lattice. We analyze modulational instability of the extended Bloch-wave modes and also investigate the existence and stability of bright, dark, and "twisted" spatially localized modes in such periodic structures. Additionally...

Optical Gyrotropy and Birefringence in Magnetic Crystals

Optical properties of L-threonine Nonlinear Crystals

This works reports on the linear and nonlinear optical properties of L-threonine crystals. Linear properties such as absorption spectra and dispersion of the refractive index are presented. Through second harmonic generation measurements we characterized the phase-matching loci for this sample, which presents conversion efficiency equivalent to that ofr KDP. The nonlinear refractive index n2, m...

Optical bistability in nonlinear surface-plasmon polaritonic crystals.

Nonlinear optical transmission through periodically nanostructured metal films (surface-plasmon polaritonic crystals) has been studied. The surface polaritonic crystals have been coated with a nonlinear polymer. The optical transmission of such nanostructures has been shown to depend on the control-light illumination conditions. The resonant transmission exhibits bistable behavior with the cont...