Multiplex method for the measurement of nonlinear susceptibility spectrum applied to third-harmonic generation in a polydiacetylene

Spin-coated nickel doped cadmium sulfide thin films for third harmonic generation applications

“…THG phenomenon is observed in the nonlinear media of any symmetry; even in air (since the nonlinear optical susceptibility of air (χ ሺଷሻ = 10 ିଶ ݉ ଶ ܸ ିଶ [32]) is much lower than that one of fused silica ߯ ௦ ሺଷሻ = 2 × 10 ିଶଶ ݉ ଶ ܸ ିଶ [33]). …”

Reference free Chi 3 dispersion measurements in planar tantalum pentoxide waveguides

“…This is in contrast to other processes such as degenerate four-wave mixing and optical Kerr effect [23], where other competing nonlinear effects complicate the experimental analysis. THG has been observed in several materials including: BIBO (Bismuth triborate, 6 3 O BiB ) [24], thin sapphire crystals [25], fused silica [26], carbon nanotubes [27], and other types of single crystals [28].…”

“…We report the experimental demonstration of THG in planar χ through THG based on the work of Meredith et al [22] and Kobayashi et al [23]. Our revised method does not require a reference material (e.g.…”

“…However, instead of moving the sample in the z-direction, the sample is rotated on a plate to adjust phase matching conditions and the nonlinear coefficient is extracted by examining fringes which occurs through interference of the detected third-harmonic intensity in a Maker interferometer. [21][22][23] has also been used to determine Previous experiments measured the intensity/polarization field of THG in single/sapphire crystals and optical fibers to obtain ) 3 ( χ values. With this method a known reference material is required (most commonly fused silica).…”