Abstract
Centrosymmetry of molecular aggregates having a center of inversion can be broken by applying an external DC electric field and even-order nonlinear optical processes can be studied. Electric field induced second-harmonic generation (EFISHG) has been studied in centrosymmetric polydiacetelene (PDA) to investigate resonant enhancement of χ(3) (-2ω;ω,ω,0) and two photon generation of carriers1 and determine the phase and value of χ(3) (-2ω;ω,ω,0) 2. EFISHG experiments have also been reported on molecules in solution to study the molecular environment3 and influence of carrier substituents4. In this paper, we report the first EFISHG measurements in optically transparent, ferroelectric oxide PLZT (La- doped lead zirconate titanate) ceramic materials.
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