Langastie crystal (La3Ga5SiO14, LGS), belonging to the space group P321, point group 32, has been reported to be promising new piezoelectric materials for fabrication of surface acoustic wave (SAW) and bulk acoustic wave (BAW) devices.
Gallium Selenide (GaSe) non-linear optical single crystal, combining a large non-linear coefficient, a high damage threshold and a wide transparency range. It is a is very suitable material for SHG in the mid-IR.
TGG is an excellent magneto-optical crystal used in various Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm, excluding 475-500nm.
Gadolinium gallium garnet (GGG) is a special substrate magneto optical films. In optical communication equipment, a large number of 1.3 and 1.5 micron optical isolators are needed, and the core component is YIG or BIG film placed in the magnetic field.
GGG(12.373 Å) has similar lattice parameter with YIG(12.376 Å)，is one of the most wildly used YIG magneto-optic film substrates.
Tm,Ho:LuAG crystal with high optical quality is grown successfully by the Czochralski method. Tm,Ho:LuAG crystal is a potential mid-infrared laser material to realize the laser at 2.911 μm.