BaGa4Se7 Crystals

Karistaanka tayada sare leh ee BGse (BaGa4Se7) waa analoogga selenide ee isku dhafka chalcogenide BaGa4S7, kaas oo qaabdhismeedkiisa acentric orthorhombic lagu aqoonsaday 1983 iyo saamaynta IR NLO ayaa la soo sheegay 2009, waa crystal IR NLO cusub.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 oo 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 cabbiray 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 qiyaasay inuu yahay 557 MW/cm2 iyadoo la adeegsanayo Nd: YAG (1.064 μm) laser 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 is-waafajinta (SHG) taas oo qiyaastii 2-3 jeer ka badan AgGaS2.Xaddiga waxyeelada laysarka oogada ayaa ku dhawaad ​​3.7 jeer ka badan kristal AgGaS2 oo xaalado isku mid ah hoos yimaada.
Crystal BGSe waxay leedahay u nuglaansho ballaaran oo aan toos ahayn, waxaana laga yaabaa inay leedahay rajo ballaaran oo loogu talagalay codsiyada wax ku oolka ah ee gobolka dhexe ee IR. Waxay muujinaysaa terahertz phonon-polaritons oo xiiso leh iyo iskudhafyo aan toos ahayn oo sarreeya oo loogu talagalay 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, dalool-galka/extravity, garaacista 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.