Cov muaju zoo ntawm BGSe (BaGa4Se7) yog cov selenide analogue ntawm chalcogenide compound BaGa4S7, uas nws cov qauv acentric orthorhombic tau txheeb xyuas hauv xyoo 1983 thiab IR NLO cov nyhuv tau tshaj tawm xyoo 2009, yog ib qho tshiab tsim IR NLO siv lead ua.Nws tau txais los ntawm cov txheej txheem Bridgman-Stockbarger.Cov khoom siv lead ua no nthuav tawm cov kev xa tawm siab tshaj qhov dav ntawm 0.47-18 μm, tshwj tsis yog rau qhov siab tshaj plaws ntawm 15 μm.
FWHM ntawm (002) ncov rocking nkhaus yog hais txog 0.008 ° thiab kev xa tawm los ntawm polished 2 hli tuab (001) phaj yog nyob ib ncig ntawm 65% tshaj qhov dav ntawm 1-14 μm.Ntau yam thermophysical zog tau ntsuas ntawm cov muaju.
Lub thermal expansion cwj pwm nyob rau hauv BaGa4Se7 tsis pom muaj zog anisotropy nrog αa = 9.24 × 10−6 K−1, αb = 10.76 × 10−6 K−1, thiab αc = 11.70 × 10−6 K−1 raws peb crystallographic axes .Thermal diffusivity/thermal conductivity coefficients ntsuas ntawm 298 K yog 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, raws tus a, b, c crystallographic axis feem.
Tsis tas li ntawd, qhov kev puas tsuaj saum npoo av tau ntsuas los ntawm 557 MW / cm2 siv Nd: YAG (1.064 μm) laser nyob rau hauv cov xwm txheej ntawm 5 ns mem tes dav, 1 Hz zaus, thiab D = 0.4 mm qhov loj me.
BGSe (BaGa4Se7) siv lead ua nthuav tawm cov hmoov thib ob sib haum xeeb (SHG) cov lus teb uas yog kwv yees li 2-3 npaug ntawm AgGaS2.Qhov kev puas tsuaj ntawm lub ntsej muag yog li 3.7 npaug ntawm AgGaS2 siv lead ua nyob rau hauv cov xwm txheej zoo ib yam.
BGSe siv lead ua muaj qhov tsis zoo ntawm cov kab hluav taws xob loj, thiab tej zaum yuav muaj lub zeem muag dav rau kev siv tswv yim hauv nruab nrab-IR spectral cheeb tsam.
Qhov zoo rau IR laser tso zis:
Haum rau ntau yam twj tso kua mis (1-3μm)
Dav tunable IR tso zis ntau yam (3-18μm)
OPA, OPO, DFG, intracavity / extravity, cw / mem tes twj
Daim ntawv ceeb toom tseem ceeb: Txij li qhov no yog hom tshiab siv lead ua, sab hauv siv lead ua tej zaum yuav muaj ob peb streaks, tab sis peb tsis lees txais rov qab vim qhov tsis xws luag.
