Second harmonic generation (SHG) laser spectroscopy has been demonstrated to be a powerful, sensitive, and non-destructive analytical technique to study crystalline phases, domain and molecular dipole orientations, and relaxation dynamics of ferroelectric polymeric thin films of polyvinylidene fluoride (PVDF). SHG also provides the detailed information at molecular levels and properties at interfaces. The current study of single layered PVDF polymer has shown that SHG can be further developed into an in situ, sensitive and quantitative tool to study ferroelectric polymeric thin film structures. We have used SHG to illustrate the decoupled so called αc− and β− relaxation dynamics processes in PVDF systems.

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