Abstract: A Perfect,crack-free single crystal of AgGaSe₂ of 20mm in diameter and 55mm in length is grown by a modified Bridgman-Stockbarger technique in the two-zone vertical furnace. A sample of sibs of 10min×10mm×9mm is cut along the (101) cleavage plane. It is found by the IR microscope that there are few inclusions and defects in the crystal. The transmission is 62% and the absorption coefficient is 0.05 cm^-1 at 10.6 μm, respectively. The thermal etch pits and corrosion stripes are observed by the Scanning Electron Microscope.

Key words: infrared nonlinear optics, silver selenogallate Single crystal, characterization study, crystal growth