SEARCH Articles Figures Tables EFISH EFISH electric field-induced second harmonic EFISH harmonic generation EFISH harmonic technique EFISH second harmonic Electric Field Second Harmonic Generation EFISH) Electric field induced second harmonic EFISH) technique Electric field-induced second harmonic generation EFISH) Electric-field-induced second harmonic generation technique (EFISH Second-harmonic generation EFISH) Third-harmonic generation EFISH)