Karistaanka tayada sare leh ee BGse (BaGa4Se7) waa analoogga selenide ee isku dhafka chalcogenide BaGa4S7, kaas oo qaab-dhismeedkiisa orthorhombic lagu aqoonsaday 1983 iyo saamaynta IR NLO ayaa la soo sheegay 2009, waa kiristaalo cusub oo IR NLO ah.Waxaa lagu helay farsamada Bridgman-Stockbarger.crystal Tani waxay muujinaysaa gudbinta sare ee baaxadda ballaaran ee 0.47-18 μm, marka laga reebo ugu sarreeya nuugista oo ku saabsan 15 μm.
FWHM ee (002) qalooca ugu sarreeya ee ruxaya waxay ku saabsan tahay 0.008 ° iyo gudbinta dhexroorka 2 mm qaro weyn (001) oo dhalaalaya ayaa ku dhow 65% marka loo eego baaxadda ballaaran ee 1-14 μm.Hababka heerkulbeegga ee kala duwan ayaa lagu cabbiray kiristaalo.
Dabeecadda fidinta kulaylka ee BaGa4Se7 ma muujinayso anisotropy xooggan leh αa = 9.24 × 10-6 K-1, αb = 10.76 × 10-6 K-1, iyo αc = 11.70 × 10-6 K-1 oo ay weheliyaan saddexda faashadood ee crystallographic .Isku dhafka kuleylka kuleylka / kuleylka kuleylka ee lagu qiyaasay 298 K waa 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, oo ay la socdaan dhidibka a, b, c crystallographic siday u kala horreeyaan.
Intaa waxaa dheer, marinka waxyeelada laysarka dusha waxaa lagu cabiray inuu yahay 557 MW/cm2 iyadoo la adeegsanayo laysarka Nd:YAG (1.064 μm) iyadoo la raacayo shuruudaha 5 ns ballac garaaca wadnaha, inta jeer ee 1 Hz, iyo D=0.4 mm cabbirka booska.
BGse (BaGa4Se7) crystal waxay soo bandhigaysaa jawaab celinta budada labaad ee iswada leh (SHG) taas oo u dhiganta 2-3 jeer ka AgGaS2.Heerka waxyeelada laysarka oogada waxay ku saabsan tahay 3.7 jeer ka kristal AgGaS2 oo hoos yimaada xaalado isku mid ah.
Crystal BGSe waxay leedahay nuglaansho aan toos ahayn oo ballaaran, waxaana laga yaabaa inay leedahay rajo ballaaran oo loogu talagalay codsiyada la taaban karo ee bartamaha-IR spectral region.Waxay muujinaysaa terahertz phonon-polaritons xiiso leh iyo coefficients sare oo aan toos ahayn ee jiilka terahertz.
Faa'iidooyinka soo saarista laysarka IR:
Ku habboon ilaha kala duwan ee bamgareynta (1-3μm)
Baaxadda wax soo saarka IR ee la hagaajin karo (3-18μm)
OPA, OPO, DFG, daloosha/extravity, cw/ garaaca wadnaha
Ogeysiis muhiim ah: Maadaama tani ay tahay nooca cusub ee crystal, gudaha crystal ayaa laga yaabaa inuu leeyahay xariijimo yar, laakiin ma aqbalno soo celinta ciladan awgeed.
