Second harmonic generation (SHG) laser spectroscopy has been demonstrated to be a powerful, sensitive,
and non-destructive analytical technique to study crystalline phases, domain structures, and molecular dipole
orientations of ferroelectric polymeric thin films such as PVDF. While other spectroscopic techniques, such as
WXRD and FTIR, do provide valuable information on the crystalline phases, they are not sensitive enough to
provide the detailed information at molecular levels and properties at interfaces. The current study of single layered
PVDF polymer has also shown that SHG can be further developed into an in-situ, sensitive and quantitative tool to
study ferroelectric polymeric thin film structures. In combination, SHG and electric field induced SHG (EFISH)
techniques will allow us to interrogate multilayered structures layer-by-layer, the effects of physical confinement
and interfacial physics.
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