Browsing by Author "Lin, Zhi-Guang"

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Characterization and properties of infrared NLO crystals: AGeX(3) (A = Rb, Cs; X = Cl, Br)
(2008-06-15)
Lin, Zhi-Guang
;
Tang, Li-Chuan
;
Chou, Chang-Pin
;
機械工程學系
;
Department of Mechanical Engineering
innovative infrared nonlinear optical crystals AGeX(3) were synthesized. Their powder X-ray diffraction patterns demonstrated that they had rhombohedral structures with R3m (no. 160) space group symmetry (except RbGeBr3). Their structural distortion increased with Br content, but decreased with Rb content. The Kurtz powder methods revealed that the nonlinear optical efficiency of CsGeBr3 is 9.64 times that of rhombohedral CsGeCl3 and 28.29 times that of KDP; most importantly, AGeX(3) is phasematchable (except RbGeBr3). (C) 2008 Elsevier B.V. All rights reserved.
Characterization and properties of novel infrared nonlinear optical crystal CsGe(BrxCl1-x)(3)
(2008-04-07)
Lin, Zhi-Guang
;
Tang, Li-Chuan
;
Chou, Chang-Pin
;
機械工程學系
;
Department of Mechanical Engineering
Innovative infrared nonlinear optical crystals CsGe(BrxCl(1-x))(3) were synthesized. Their powder X-ray diffraction patterns indicated that they had rhombohedral structures with (R3m, No. 160) space group symmetry. Their structural distortion increased with x The Kurtz powder techniques revealed that the nonlinear optical efficiency of CsGeBr3 is about 9.64 times larger than that of rhombohedral CsGeCl3 and 28.29 times larger than that of KH2PO4 (KDP); most importantly, CsGe(BrCl1-x)(3) is phase-matchable. The transparent infrared spectrum of rhombohedral CsGe(BrxCl1-x)(3) was extended to over 30 mu m and demonstrated its potential in the field of nonlinear optics and applicability in the infrared region.
Infrared properties of CsGe(BrxCI1-x)3, nonlinear optical rhombohedral semiconductor
(2007-11-28)
Lin, Zhi-Guang
;
Tang, Li-Chuan
;
Chou, Chang-Pin
;
機械工程學系
;
Department of Mechanical Engineering
Innovative infrared nonlinear optical crystals CsGe( BrxCl1-x)(3) were synthesized. From their powder x-ray diffraction patterns, these crystals were characterized as rhombohedral structure with ( R3m, No 160) space group symmetry. The energy gap decreased from about 3.43 to 2.38 eV as the substitutional ratio, x, changed from zero to unity. Moreover, the powder second-harmonic generation ( PSHG) measurement of CsGeBr3 showed that its nonlinear optical efficiency is 9.64 times larger than that of rhombohedral CsGeCl3 and 28.29 times larger than that of KH2PO4 (KDP), and most important of all, that CsGe( BrxCl1-x)(3) is phase matchable. So the optical nonlinearity is approximately inversely proportional to the cube of the energy gap. The infrared transparent spectrum of rhombohedral CsGe( BrxCl1-x)(3) was extended to more than 30 mu m, which shows the potential in the realm of nonlinear optics and can be applied to the infrared region.
Study on mid-IR NLO crystals CsGe(BrxCl1-x)(3)
(2008-09-01)
Lin, Zhi-Guang
;
Tang, Li-Chuan
;
Chou, Chang-Pin
;
機械工程學系
;
Department of Mechanical Engineering
An innovative infrared nonlinear optical crystal CsGe(BrxCl1-x)(3) was synthesized. From its powder X-ray diffraction pattern, this crystal was characterized as a rhombohedral structure with a (R3m, No.160) space group symmetry. The powder second-harmonic generation (PSHG) measurement of CsGeBr3 showed that its nonlinear optical efficiency is 9.64 times larger than that of rhombohedral CsGeCl3 and is 28.28 times larger than that of KH2PO4 (KDP), and most important of all, that CsGe(BrxCl1-x)(3) is phase-matchable. The infrarted transparent spectrum of rhombohedral CsGe(BrxCl1-x)(3) was extended to more than 30 mu m. The rhombohedral CsGe(BrxCl1-x)(3) shows the potential in the realm of nonlinear optics and can be applied to the infrared region. (c) 2008 Elsevier B.V. All rights reserved.