Large third-order nonlinear susceptibility from a gold metasurface far off the plasmonic resonance

The third-order nonlinear optical susceptibility of gold

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...

Third-order susceptibility of gold for ultrathin layers.

This Letter presents an experimental study of nonlinear plasmonic effects in gold-stripe waveguides. The optical characterization is performed by a picosecond laser and reveals two nonlinear effects related to propagation of long-range surface plasmon polaritons: nonlinear power transmission of plasmonic modes and spectral broadening of plasmonic modes. The experimental values of the third-orde...

Near-infrared dye having a large ultrafast third-order susceptibility.

Efficient degenerate four-wave mixing of 160-psec infrared light pulses at lambda = 1.064 microm in solutions of a new dye that absorbs between 1.0 and 1.6 microm is reported. A Kerr-like third-order susceptibility of X((3))(xyyx) = 8 +/- 3) x 10(-12) esu with a decay time of less than 50 psec is observed in various solvents.

The Third Order Nonlinear Optical behavior of Poly Ether Urethane

Poly (ether) urethane close/open cell (PEUCC/PEUOC) has been prepared by using in situ polymerization approach. The third-order optical nonlinearities of dissolved samples in DMF were characterized by Z-scan technique at the measurement wavelength of 532 nm. The synthesized samples were also examined by optical microscopy and UV-Vis absorption spectroscopy. The nonlinear refractive (NLR) indice...

Fano collective resonance as complex mode in a two-dimensional planar metasurface of plasmonic nanoparticles