Picosecond degenerate four-wave mixing in colloidal solutions of gold nanoparticles at high repetition rates.
Time-resolved degenerate four-wave mixing experiments on a colloidal solution of 50-nm gold particles in acetone, using a high-repetition-rate laser source, are presented. The signal is found to depend strongly on the repetition rate of the incident radiation and above a frequency of 300 kHz is impossible to measure.
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Puech
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Blau
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Grund
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Bubeck
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Cardenas