Lu'ulu'u masu inganci na BGse (BaGa4Se7) shine analog ɗin selenide na fili na chalcogenide BaGa4S7, wanda aka gano tsarin acentric orthorhombic a cikin 1983 kuma an ba da rahoton tasirin IR NLO a cikin 2009, sabon haɓakar IR NLO crystal ne.An samo shi ta hanyar fasahar Bridgman-Stockbarger.Wannan lu'ulu'u yana nuna babban watsawa a cikin kewayon 0.47-18 μm, sai dai ga kololuwar sha a kusan 15 μm.
FWHM na (002) ƙwanƙwasa ƙoƙon girgiza yana kusan 0.008 ° kuma watsawa ta hanyar farantin kauri 2 mm mai gogewa (001) yana kusa da 65% akan kewayon 1-14 μm.An auna kaddarorin thermophysical iri-iri akan lu'ulu'u.
Halin haɓakar thermal a cikin BaGa4Se7 baya nuna anisotropy mai ƙarfi tare da αa = 9.24 × 10-6 K-1, αb = 10.76 × 10−6 K-1, da αc = 11.70 × 10-6 K-1 tare da gatari uku na crystallographic. .Matsakaicin diffusivity na thermal / thermal conductivity coefficients wanda aka auna a 298 K sune 0.50 (2) mm2 s-1 / 0.74 (3) W m-1 K-1, 0.42 (3) mm2 s-1 / 0.64 (4) W m-1 K-1, 0.38 (2) mm2 s-1 / 0.56 (4) W m-1 K-1, tare da a, b, c crystallographic axis bi da bi.
Bugu da ƙari, an auna kofa na lalacewar laser don zama 557 MW / cm2 ta amfani da Laser Nd: YAG (1.064 μm) a ƙarƙashin yanayin 5 ns nisa bugun jini, mitar 1 Hz, da D=0.4 mm girman tabo.
BGse (BaGa4Se7) crystal yana nuna amsawar foda na biyu masu jituwa (SHG) wanda shine kusan sau 2-3 na AgGaS2.Matsakaicin lalacewar Laser yana kusan sau 3.7 na kristal AgGaS2 a ƙarƙashin yanayi iri ɗaya.
BGSe crystal yana da babban haɗari mara kyau, kuma yana iya samun fa'ida mai fa'ida don aikace-aikacen aikace-aikace a cikin yanki na spectral na tsakiyar-IR.Yana nuna ban sha'awa terahertz phonon-polaritons da manyan ƙididdiga marasa daidaituwa don tsara terahertz.
Abvantbuwan amfãni ga fitarwa na Laser IR:
Ya dace da tushen famfo daban-daban (1-3μm)
Faɗin fitarwa na IR mai faɗi (3-18μm)
OPA, OPO, DFG, intracavity / extravity, cw / bugun jini famfo
Muhimmiyar sanarwa: Tun da wannan sabon nau'in kristal, ciki crystal na iya samun ƴan filaye, amma ba ma karɓar dawowa saboda wannan lahani.
