Second harmonic generation response of the cubic chalcogenides Ba(6−x)Srx[Ag(4−y)Sn(y/4)](SnS4)4

A series of new cubic chalcogenides Ba(6−x)Srx[Ag(4−y)Sn(y/4)](SnS4)4 display superior SHG intenisties compared to AgGaSe2 from 600 to 1000 nm. With the substitutions of cations (x=0-6), the SHG signal remains strong while providing tunability in the band gap for these isotropic NLO materials.258