Gallium Selenides

1). GaSe and GaSe:In


Application fields:
  • second harmonic generation of CO2-lasers 
  • up-conversion of CO2-laser radiation image into near-IR or visible region 
  • frequencies mixing in the middle IR region 
  • differencial frequencies generation (DFG) in the middle IR region from 5.5 to 18.0 µm 
Structure 62m; a = 3.74 Å; c = 15.89 Å
Density 5.03 g/cm3
Mohs hardness 2
Eg, eV 2.02
Refractive indexes at at 5.3 µm no = 2.8340; ne = 2.4599
Refractive indexes at 10.6 µm no = 2.8136; ne = 2.4389
Refractive index at 0.633 µm no= 2.9365
Max. single crystal diameter/length: Æ 30´30-40 mm

Transmittance spectra (undoped GaSe):

Cleaved GaSe sample:

2). b-Ga2Se3 (monoclinic)

Transmittance spectra (3 mm sample thickness):

Material Safety Data Sheet