Likristale tsa boleng bo holimo tsa BGSe (BaGa4Se7) ke analogue ea selenide ea motsoako oa chalcogenide BaGa4S7, eo sebopeho sa eona sa acentric orthorhombic se ileng sa tsejoa ka 1983 mme phello ea IR NLO e tlalehiloe ka 2009, ke kristale e sa tsoa ntlafatsoa ea IR NLO.E fumanoe ka mokhoa oa Bridgman-Stockbarger.kristale ena e bonts'a phetisetso e phahameng ho feta mefuta e mengata ea 0.47-18 μm, ntle le tlhoro ea ho monya e ka bang 15 μm.
FWHM ea (002) e ka bang 0.008 ° 'me phetisetso ka poleiti e bentšitsoeng ea 2 mm thick (001) e ka ba 65% holim'a mefuta e mengata ea 1-14 μm.Lintho tse fapaneng tsa thermophysical li ne li lekantsoe ka likristale.
Boitšoaro ba katoloso ea mocheso ho BaGa4Se7 ha bo bontše anisotropy e matla le αa=9.24×10−6 K−1, αb=10.76×10−6 K−1, le αc=11.70×10−6 K−1 hammoho le selepe sa crystallographic. .Thermal diffusivity/thermal conductivity coefficients tse lekantsoeng ho 298 K ke 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, hammoho le a, b, c crystallographic axis ka ho latellana.
Ho phaella moo, moeli oa tšenyo ea laser holim'a metsi o ne o lekantsoe ho ba 557 MW / cm2 ho sebelisa Nd: YAG (1.064 μm) laser tlas'a maemo a 5 ns pulse wide, 1 Hz frequency, le D = 0.4 mm boholo ba sebaka.
BGSe (BaGa4Se7) kristale e bonts'a karabo ea phofo ea bobeli ea harmonic generation (SHG) hoo e ka bang makhetlo a 2-3 ho feta AgGaS2.Moeli oa tšenyo ea laser e kaholimo ke makhetlo a 3.7 ho feta a kristale ea AgGaS2 tlasa maemo a ts'oanang.
BGSe kristale e na le ts'oaetso e kholo e se nang moeli, 'me e ka ba le tebello e pharaletseng ea lisebelisoa tse sebetsang sebakeng se bohareng ba IR spectral.E bontša li-terahertz phonon-polaritons tse thahasellisang le li-coefficients tse phahameng tse se nang moeli bakeng sa moloko oa terahertz.
Melemo ea tlhahiso ea laser ea IR:
E loketse mehloli e fapaneng ea ho pompa (1-3μm)
Mefuta e mengata e pharalletseng e hlahisoang ke IR (3-18μm)
OPA, OPO, DFG, intracavity/extravity, cw/pulse pumping
Tlhokomeliso ea bohlokoa: Kaha sena ke mofuta o mocha oa kristale, ka hare ho kristale e ka 'na ea e-ba le mekhahlelo e fokolang, empa ha re amohele ho khutlisetsoa ka lebaka la sekoli sena.
