Voltage-Controlled Diffraction Modulation in Manganese-Doped Potassium Sodium Tantalate Niobate Single Crystals.

Paraelectric potassium sodium tantalate niobate (KNTN) crystals have been grown with two different Mn concentrations, namely, 0.25 and 0.5 mol %. High voltage-controlled diffraction efficiencies of 79 and 74%, and large two-wave mixing gains of 36 and 32 cm^-1 were achieved for the 1.0 mm thick 0.25 and 0.5 mol % Mn-doped KNTN samples, respectively. The amplitude modulation of the diffracted beam by an AC external field at a frequency of 100 Hz was demonstrated. The results show that Mn-doped KNTN is a promising material for voltage-controlled diffractive applications. [ABSTRACT FROM AUTHOR]