NaSb_3F_(10): A new second-order nonlinear optical crystal to be used in the IR region with very high laser damage threshod

摘要

This paper reports the second-order nonlinear optical (NLO) property of NaSb_3F_(10), a potential new NLO material in the infrared region. The compound exhibits a phase-matchable second harmonic generation (SHG) efficiency of about 3.2 times that of KH_2PO_4 based on the powder SHG measurement. A measurement indicates that its laser damage threshold is as high as about 1.3 GW/cm~2, which is much higher than all those IR NLO crystals reported in the literature. It also shows excellent transparency in the range of 0.25-7.8 μm with relativity high thermal stability. Single crystal of the size 12×10×8 mm~3 has been grown in aqueous solution by a slow evaporation technique.