BGSe(BaGa4Se7) Makristasi


  • space group: Pc
  • Transmission range:0.47-18μm
  • Yakakura NLO coefficient:d11 = 24 pm/V
  • Birefringence @2μm:0.07
  • Kukuvadza chikumbaridzo (1μm, 5ns ):550MW/cm2
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    Makristasi epamusoro-soro eBGSe (BaGa4Se7) ndiyo selenide analogue yechalcogenide compound BaGa4S7, iyo acentric orthorhombic structure yakaonekwa muna 1983 uye iyo IR NLO effect yakashumwa muna 2009, ichangobva kugadzirwa IR NLO crystal.Yakawanikwa kuburikidza neiyo Bridgman-Stockbarger maitiro.Iyi kristaro inoratidza kutapurirana kwepamusoro pamusoro pehupamhi hwe0.47-18 μm, kunze kweiyo peak yekunyudza inosvika 15 μm.
    Iyo FWHM ye (002) peak rocking curve ingangoita 0.008 ° uye transmittance kuburikidza neakakwenenzverwa 2 mm gobvu (001) ndiro inotenderera 65% pamusoro pehupamhi hwe1-14 μm.Yakasiyana-siyana thermophysical properties yakayerwa pamakristasi.
    Maitiro ekuwedzera kupisa muBaGa4Se7 haaratidzi anisotropy yakasimba ine αa=9.24×10−6 K−1, αb=10.76×10−6 K−1, uye αc=11.70×10−6 K−1 pamwe nematemo matatu ekristaro. .Thermal diffusivity/thermal conductivity coefficients akayerwa pa 298 K i 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, pamwe nea, b, c crystallographic axis zvichiteerana.
    Uye zvakare, iyo yepamusoro laser kukuvara kwechikumbaridzo yakayerwa kuita 557 MW/cm2 uchishandisa Nd: YAG (1.064 μm) laser pasi pemamiriro e5 ns pulse wide, 1 Hz frequency, uye D=0.4 mm saizi yemavara.
    BGSe (BaGa4Se7) crystal inoratidza poda yechipiri harmonic chizvarwa (SHG) mhinduro inenge 2-3 nguva yeAgGaS2.Iyo yepamusoro laser kukuvara chikumbaridzo ingangoita 3.7 nguva iyo yeAgGaS2 crystal pasi pemamiriro akafanana.
    BGSe crystal ine hombe isina mutsara susceptibility, uye inogona kuva netarisiro yakafara yeanoshanda maapplication ari pakati peIR spectral region.Inoratidza inonakidza terahertz phonon-polaritons uye yakakwirira nonlinear coefficients kuchizvarwa terahertz.
    Zvakanakira IR laser kubuda:
    Inokodzera kwakasiyana kupomba sosi (1-3μm)
    Yakakura tunable IR kubuda kwemhando (3-18μm)
    OPA, OPO, DFG, intracavity/extravity, cw/pulse pumping
    Chiziviso chakakosha: Sezvo iyi rudzi rutsva rwekristaro, mukati mekristaro inogona kunge iine mitsetse mishoma, asi isu hatibvumi kudzoserwa nekuda kwehurema.

    space group Pc
    Transmission range 0.47-18μm
    Yakakura NLO coefficient d11 = 24 pm/V
    Birefringence @2μm 0.07
    Kukuvadza chikumbaridzo (1μm, 5ns) 550MW/cm2