Abstract
Coherent anti-Stokes Raman scattering (CARS) via terahertz-frequency optical phonon modes was successfully applied to the imaging of periodically poled lithium niobate crystals. Using spectral changes in the E-mode (50-1100 cm−1 = 1.5-33 THz), periodic structures of ferroelectric domains (period: 20 µm) were clearly mapped with CARS signals.
© 2007 IEEE
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