Phase-mismatched degenerate four-wave mixing: complex third-order susceptibility tensor elements of C_60 at 768 nm

Strohkendl, F. P.; Dalton, L. R.; Hellwarth, R. W.; Sarkas, H. W.; Kafafi, Z. H.

doi:10.1364/josab.14.000092

Cited by 43 publications

(51 citation statements)

References 14 publications

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“…This fused-silica value corresponds to the weighted average of the values given in Refs. [25][26][27][28] taking into account dispersion, as well as the different nonlinear processes used in the different references. All values used in the average are within 10% of each other.…”

Section: Methodsmentioning

confidence: 99%

“…(21) to obtain the spatial profile of the nonlinear polarization responsible for the DFWM signal (nonlinear absorption will be irrelevant for the generated signal wave, which has a much lower intensity). The resulting wave equation would be (28) where the /, are the intensities of the three "pump" beams that create the nonlinear polarization. But it is worth repeating that when the three intensities are similar, this does not take into account cross-interaction effects between the three beams.…”

Section: Degenerate Four-wave Mixingmentioning

confidence: 99%

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Two-photon absorption and spectroscopy of the lowest two-photon transition in small donor-acceptor–substituted organic molecules

et al. 2015

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We determine the dispersion of the third-order polarizability of small donor-acceptor substituted organic molecules using wavelength-dependent degenerate four-wave mixing experiments in solutions with varying concentrations. We find that donor-acceptor-substituted molecules that are characterized by extremely efficient off-resonant nonlinearities also have a correspondingly high two-photon absorption cross section. The width and shape of the first two-photon resonance for these noncentrosymmetric molecules follows what is expected from their longest wavelength absorption peak, and the observed two-photon absorption cross sections are record high when compared to the available literature data, the size of the molecule, and the fundamental limit for two-photon absorption to the lowest excited state, which is essentially determined by the number of conjugated electrons and the excited-state energies. The two-photon absorption of the smallest molecule, which only has 16 electrons in its conjugated system, is one order of magnitude larger than for the molecule called AF-50, a reference molecule for two-photon absorption [O.-K. Kim et al., Chem. Mater. 12, 284 (2000)].

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Section: Methodsmentioning

confidence: 99%

Section: Degenerate Four-wave Mixingmentioning

confidence: 99%

Two-photon absorption and spectroscopy of the lowest two-photon transition in small donor-acceptor–substituted organic molecules

et al. 2015

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“…One was generated as a result of phase-matched interaction of the three incident beams, and the other was one of the non-phase-matched signals generated mostly by the arsenic trisulfide film. 24,25 For a 4-m-thick film, the non-phase-matched signal was approximately half the phase-matched signal. Figure 10 shows an example of a non-phase-matched DFWM signal at moderate input power (ϳ15-J total energy in all three beams, corresponding to an intensity of the order of 100 GW/cm 2 ).…”

Section: F Nonlinear Optical Constantsmentioning

confidence: 99%

Low-loss waveguides in ultrafast laser-deposited As_2S_3 chalcogenide films

et al. 2003

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“…The latter quantity is typically two orders of magnitude higher than the diffracted nonlinear signal (ε T ≫ ε D NL ), thus no problem of division by zero could happen. Moreover, we have shown that by choosing an appropriate object at the entry and a field stop in the image plane, we can perform various well-known experiments as Degenerate Four Wave Mixing (DFWM) [21,22], Z-scan, EZ-scan, I-scan [23] or Nonlinear Imaging Technique with a Phase Object (NIT-PO) [15]. Therefore, all these seemingly different methods can be considered as special cases of the same nonlinear imaging process.…”

Section: Introductionmentioning

confidence: 99%