ʻO nā kristal kiʻekiʻe o BGSe (BaGa4Se7) ka selenide analogue o ka hui chalcogenide BaGa4S7, nona ka acentric orthorhombic structure i ʻike ʻia i ka makahiki 1983 a ua hōʻike ʻia ka hopena IR NLO ma 2009, he aniani IR NLO hou.Ua loaʻa iā ia ma o ka ʻenehana Bridgman–Stockbarger.Hōʻike kēia aniani i ka transmittance kiʻekiʻe ma luna o ka laulā o 0.47-18 μm, koe wale no kahi kiʻekiʻe absorption ma kahi o 15 μm.
ʻO ka FWHM o ka (002) peak rocking curve ma kahi o 0.008° a ʻo ka hoʻouna ʻana ma o kahi pā 2 mm mānoanoa (001) i poni ʻia ma kahi o 65% ma luna o ka laulā o 1-14 μm.Ua ana ʻia nā waiwai thermophysical like ʻole ma nā kristal.
ʻAʻole hōʻike ka ʻano hoʻonui wela i BaGa4Se7 i ka anisotropy ikaika me αa=9.24×10−6 K−1, αb=10.76×10−6 K−1, a me αc=11.70×10−6 K−1 ma nā axes crystallographic ʻekolu. .ʻO nā helu helu hoʻoheheʻe wela/wela wela i ana ʻia ma 298 K he 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, ma ke axis crystallographic a, b, c.
Eia kekahi, ua ana ʻia ka paepae pōʻino o ka laser ma 557 MW/cm2 me ka hoʻohana ʻana i ka laser Nd:YAG (1.064 μm) ma lalo o nā kūlana o 5 ns pulse ākea, 1 Hz frequency, a me D=0.4 mm ka nui kiko.
Hōʻike ʻo BGSe (BaGa4Se7) crystal i ka pauka lua harmonic generation (SHG) pane e like me 2-3 mau manawa o AgGaS2.ʻO ka paepae pōʻino o ka laser ma kahi o 3.7 mau manawa ma mua o ke aniani AgGaS2 ma lalo o nā kūlana like.
Loaʻa ka BGSe kristal i ka hikiwawe nonlinear nui, a hiki ke loaʻa ka manaʻo ākea no ka hoʻohana pono ʻana i ka mid-IR spectral region.It hōʻike hoihoi terahertz phonon-polaritons a me nā coefficients nonlinear kiʻekiʻe no ka hanauna terahertz.
Nā pōmaikaʻi no ka hoʻopuka laser IR:
He kūpono no nā kumu puna like ʻole (1-3μm)
Laulā puka puka IR hiki ke hoʻopaʻa ʻia (3-18μm)
OPA, OPO, DFG, intracavity/extravity, cw/pulse pumping
Hoʻolaha koʻikoʻi: No ka mea he ʻano kristal hou kēia, ʻaʻole liʻiliʻi nā kaha o loko, akā ʻaʻole mākou e ʻae i ka hoʻihoʻi ʻana ma muli o kēia hemahema.
