1 research outputs found
LiGaGe<sub>2</sub>S<sub>6</sub>: A Chalcogenide with Good Infrared Nonlinear Optical Performance and Low Melting Point
In this work, we
design and synthesize a new chalcogenide LiGaGe<sub>2</sub>S<sub>6</sub> on the basis of known infrared (IR) material LiGaS<sub>2</sub> by
partially substituting Ga with Ge. This compound possesses very strong
nonlinear (NLO) response (2.5 × LiGaS<sub>2</sub>) and large
band gap (3.52 eV), manifesting a better balance between band gap
and NLO response compared with that for LiGaS<sub>2</sub>. Moreover,
LiGaGe<sub>2</sub>S<sub>6</sub> exhibits a much lower melting point
(663 °C) than that of LiGaS<sub>2</sub> (1050 °C). This
would result in the much smaller vapor pressure of sulfur in the fused
quartz vessels used for the crystal growth, and thus, it should be
greatly beneficial to obtain the large stoichiometric LiGaGe<sub>2</sub>S<sub>6</sub> single crystal. Our studies demonstrate that LiGaGe<sub>2</sub>S<sub>6</sub> is a good candidate material for IR NLO applications