Giant Enhancement of Surface Second Harmonic Generation in BaTiO₃ due to Photorefractive Surface Wave Excitation
classification
❄️ cond-mat.mtrl-sci
cond-mat.str-el
keywords
surfacebatioexcitationintensityphotorefractivewaveangularapplications
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We report observation of strongly enhanced surface SHG in BaTiO_3 due to excitation of a photorefractive surface electromagnetic wave. Surface SH intensity may reach 10^{-2} of the incident fundamental light intensity. Angular, crystal orientation and polarization dependencies of this SHG are presented. Possible applications of this effect in nonlinear surface spectroscopy are discussed.
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