Mehloli ea Terahertz e 'nile ea e-ba e' ngoe ea theknoloji ea bohlokoa ka ho fetisisa tšimong ea mahlaseli a THz. Litsela tse ngata li ne li ipakile li sebetsa ho finyella mahlaseli a THz. Ka tloaelo, theknoloji ea telectronics le photonics.Ho filed of photonics, nonlinear optical difference-frequency generation e thehiloeng holim'a coefficient e kholo e sa tsitsang, ts'ebetso e phahameng ea optical threshold nonlinear crystals ke e 'ngoe ea litsela tsa ho fumana matla a phahameng, a khonang, a nkehang, le mocheso oa kamore o sebetsang THz wave.GaSe le ZnGeP2(ZGP) likristale tse se nang moeli li sebelisoa hangata.
Likristale tsa GaSe tse monyang ka tlase ho millimeter & THz wave, moeli o senyehileng o phahameng le coefficient e phahameng ea bobeli e sa tsitsang (d22 = 54 pm/V), hangata e sebelisoa ho sebetsana le leqhubu la Terahertz ka har'a 40μm le leqhubu le lelelele la Thz wave (ho feta 40μm).E ile ea pakoa hore e ka sebelisoa THz wave ho 2.60 -39.07μm ha match angle a 11.19 ° -23.86 ° [eoo (e - o = o)], le 2.60 -36.68μm tlhahiso ha papali angle ho 12.19 ° -27.01 ° [ee (e) - o = e)].Ho feta moo, 42.39-5663.67μm tunable THz wave e ile ea fumanoa ha papali angle ka 1.13 ° -84.71 ° [oee (o - e = e)].
Likristale tsa ZnGeP2 (ZGP) tse nang le coefficient e phahameng ea nonlinear, conductivity e phahameng ea mocheso, monyako o senyehileng o phahameng oa optical le tsona li batlisisitsoe e le mohloli o motle oa THz.ZnGeP2 e boetse e na le coefficient ea bobeli e se nang moeli ho d36 = 75 pm/V), e leng 160times ea likristale tsa KDP.Mefuta e 'meli ea mekhahlelo ea mefuta e 'meli ea likristale tsa ZGP (1.03 ° -10.34 ° [oee (oe = e)] & 1.04 ° -10.39 ° [oeo (oe= e)]) e sebetsana le tlhahiso e tšoanang ea THz (43.01 -5663.67μm), mofuta oa ooo o ipakile e le khetho e betere ka lebaka la hore o na le coefficient e phahameng e sa sebetseng hantle.Ka nako e telele, proformance ea tlhahiso ea likristale tsa ZnGeP2 joalo ka mohloli oa Terahertz e ne e lekanyelitsoe, hobane kristale ea ZnGeP2 e tsoang ho barekisi ba bang e na le monyetla o phahameng sebakeng se haufi le infrared (1-2μm):coefficient ea ho monya> 0.7cm-1 @1μm le> 0.06 cm-1@2μm.Leha ho le joalo, DIEN TECH e fana ka likristale tsa ZGP(Mohlala: YS-ZGP) tse nang le monyetla o tlase haholo: Coefficient ea ho monya <0.35cm-1@1μm le <0.02cm-1@2μm.Likristale tse tsoetseng pele tsa YS-ZGP li thusa basebelisi ho fihlela tlhahiso e ntle haholo.
Referense:'基于 GaSe 和 Zn GeP2 晶体差频产生可调谐太赫兹辐射的理论研究'2008 Chin.Phys.Soc.
