KDy(WO4)2晶体的TSSG法生长及磁光性能研究OA

In this paper,KDy(WO4)2(KDW)crystal with a size of 40 mm × 40 mm × 15 mm was successfully grown by top-seeded solution growth(TSSG)method.The crystal structural,optical quality,thermal properties,laser induced damage threshold and magneto-optical properties of KDW crystal were comprehensively studied.The rocking curve shows that the full width at half-maximum of KDW(020)wafer is 0.071 2°,indicating that the crystal has good crystal quality.The transmittance curve shows that the KDW(020)wafer has a high transmittance in the visible-near infrared band.The results of single crystal X-ray diffraction(SCXRD)refinement show that KDW crystal belongs to monoclinic I2/a space group,and[DyO8],[WO6]and[KO10]groups constitute the crystal skeleton.The[WO6]-related vibration mode in Raman spectra matches the monoclinic KRe(WO4)2 system.Thermal tests indicate that the thermal conductivity,thermal diffusion coefficient and specific heat capacity of KDW crystal at 298 K are 3.792 W/(m·K),1.692 mm2/s and 0.307 J/(g·K),respectively.The laser induced damage threshold of KDW(020)wafer is 745.1 MW/cm2 at 1 064 nm and 10 ns.Based on the extinction method,the Verdet constants of KDW crystal at 405,532 and 635 nm are-208.30,-82.17 and-54.01 rad/(m·T),respectively,and the corresponding magneto-optical figure of merit(FOM)are 768.21,615.77 and 412.52(°)/T,respectively.This study shows that KDW crystal has excellent thermal/damage resistant properties and good visible Faraday rotation ability,and is a competitive magneto-optical crystal in visible-near infrared band.