We critically analyze reported measured values of the third-order nonlinear optical susceptibility χð3Þ of bulk gold. Reported values of this quantity span a range of more than three orders of magnitude. Much of this variation results from the use of different measurement procedures which are sensitive to different contributions to the nonlinear optical response. For example, values measured th...

The objective of the present study is to examine behaviors chirped optical solitons in fiber Bragg gratings (BGs) with dispersive reflectivity. form nonlinear refractive index represents polynomial law nonlinearity. By virtue phase-matching condition, discussed model coupled Schrödinger equation reduced an integrable form. Consequently, having various profiles such as W-shaped, bright, dark, ki...

We introduce a maskless lithography tool and optically-initiated diffusive photopolymer that enable arbitrary two-dimensional gradient index (GRIN) polymer lens profiles. The lithography tool uses a pulse-width modulated deformable mirror device (DMD) to control the 8-bit gray-scale intensity pattern on the material. The custom polymer responds with a self-developing refractive index profile th...

Large, high efficiency, volume Bragg gratings with dimensions of 5 mm× 5 mm and thickness between 1 and 7 mm with 20 μm pitch have been inscribed in poly(methyl)methacrylate (PMMA) with 180 fs, 387 nm parallel beams using both linear and circular polarizations. Linear polarization (perpendicular to the scan direction) produced the highest refractive index contrast, while circular polarization p...

Values for the two-photon absorption coefficient, 2, and nonlinear refractive index coefficients, n2, are measured for a waveguide core made of 14:14 monolayer GaAs/AlAs superlattice at photon energies below the half-bandgap. Two-photon absorption coefficients show significant anisotropy with the TE mode having 2 values up to four times greater than the TM mode. For nonlinear refraction, we det...