Figure 2: Dispersion and phase mismatch characteristics in H₂O and D₂O for four-wave mixing (IMAGE)

National Institutes of Natural Sciences

Figure 2: Dispersion and phase mismatch characteristics in H₂O and D₂O for four-wave mixing

Caption

Wavelength-dependent dispersion and phase-mismatch conditions for four-wave mixing in ordinary water (H₂O) and heavy water (D₂O). The figure illustrates how water's unique dispersion enables efficient nonlinear optical coupling under non-harmonic two-color excitation, while D₂O does not satisfy the same resonance and group-velocity matching conditions. This difference explains why the dramatic enhancement in supercontinuum generation occurs only in H₂O. 

Credit

Institute for Molecular Science / Tsuneto Kanai

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