kristal dị elu nke BGse (BaGa4Se7) bụ analog nke selenide nke chalcogenide compound BaGa4S7, nke achọpụtara usoro orthorhombic nke acentric na 1983 na mmetụta IR NLO gosipụtara na 2009, bụ kristal IR NLO emepụtara ọhụrụ.E nwetara ya site na usoro Bridgman-Stockbarger.kristal a na-egosiputa nnyefe dị elu n'obosara 0.47-18 μm, belụsọ maka mmịnye kacha elu na gburugburu 15 μm.
The FWHM nke (002) ọnụ ọgụgụ kasị elu na-ama jijiji bụ ihe dị ka 0.008 ° na nnyefe site na efere 2 mm na-egbuke egbuke (001) dị gburugburu 65% karịa obosara nke 1-14 μm.A tụrụ ihe dị iche iche nke thermophysical na kristal.
Omume mgbasawanye ọkụ na BaGa4Se7 anaghị egosipụta anisotropy siri ike na αa = 9.24 × 10-6 K-1, αb = 10.76 × 10−6 K-1, na αc = 11.70 × 10-6 K-1 tinyere axes crystallographic atọ. .Ihe ngbanwe nke diffusivity / thermal conductivity coefficients tụrụ na 298 K bụ 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, tinyere a, b, c crystallographic axis n'otu n'otu.
Na mgbakwunye, a tụrụ ọnụ ụzọ mmebi laser elu ka ọ bụrụ 557 MW / cm2 site na iji laser Nd: YAG (1.064 μm) n'okpuru ọnọdụ nke obosara pulse 5 ns, ugboro 1 Hz, na nha ntụpọ D=0.4 mm.
BGse (BaGa4Se7) kristal na-egosipụta nzaghachi ntụ ntụ nke abụọ kwekọrọ na ọgbọ nke abụọ (SHG) nke bụ ihe dịka 2-3 ugboro nke AgGaS2.Ọnụ ụzọ mmebi laser dị n'elu bụ ihe dịka 3.7 ugboro nke kristal AgGaS2 n'okpuru ọnọdụ ndị yiri ya.
kristal BGSe nwere nnukwu ohere na-enweghị ntanetị, ma nwee ike nwee atụmanya sara mbara maka ngwa bara uru na mpaghara spectral nke etiti IR. Ọ na-egosi terahertz phonon-polaritons na-adọrọ mmasị na ọnụ ọgụgụ dị elu na-enweghị isi maka ọgbọ terahertz.
Uru maka mmepụta laser IR:
Kwesịrị ekwesị maka isi iyi mgbapụta dị iche iche (1-3μm)
Oke mmepụta IR nwere ike ịgbanwe (3-18μm)
OPA, OPO, DFG, intracavity/extravity, cw/pulse pumping
Ọkwa dị mkpa: Ebe ọ bụ na nke a bụ ụdị kristal ọhụrụ, n'ime kristal nwere ike ịnwe eriri ole na ole, mana anyị anaghị anabata nloghachi n'ihi ntụpọ a.
