19. Harmonic light scattering set-up

Technique 

A femtosecond laser beam is focussed on the sample and the light scattered at the double and triple frequency (harmonic frequencies) is detected simultaneously, with msec time resolution and polarization resolved.

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Units

femtosecond laser (wavelength tuneable 700-1300 nm), spectrometer and CCD camera.            

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Instrument type

home made

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Complexity level

high

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Applications

- able to determine second-order and third-order nonlinear optical properties of molecules and polymers.

- performs in-situ measurements of aggregation and crystallization effects

- allows symmetry determination of molecules and nanoparticles