Simulated pressure-induced blue-shift of phase-matching region and nonlinear optical mechanism for K3B6O10X (X=Cl, Br)

doi:10.1063/1.4906427

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/104578

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题名:	Simulated pressure-induced blue-shift of phase-matching region and nonlinear optical mechanism for K3B6O10X (X=Cl, Br)
作者:	Zhang, Bingbing;Lee, Ming-Hsien;Yang, Zhihua;Jing, Qun;Pan, Shilie;Zhang, Min;Wu, Hongping;Su, Xin;Li, Cheng-Shun
日期:	2015-01-22
上传时间:	2016-01-06 11:03:49 (UTC+8)
摘要:	Birefringence plays a great role in phase matching of the nonlinear optical (NLO) crystals. Small birefringence restricts various crystals from achieving deep-ultraviolet laser output although they exhibit short UV cutoff edges and high second-harmonic generation (SHG) intensities. An access to achieve deeper coherent light output through external pressure on NLO crystal, K3B6O10Cl is proposed and demonstrated through computer experiment based on the first principles theory. The “hot spot” in structure that determine the SHG effects and birefringence were highlighted. The shortest achievable phase-matching wavelengths are predicted based on calculated refractive indices. It is found that the quasi-planar (B6O10)2− group is the dominant contributing unit to optical anisotropy. The pressure-induced increase of polarizability anisotropy of (B6O10)2− group can notably enlarge birefringence which extends the shortest achievable wavelength of K3B6O10Cl frequency conversion. The results show that pressure engineering may be a promising scheme to overcome the drawback of small birefringence of some NLO crystals.
關聯:	Applied Physics Letters 106, 031906
DOI:	10.1063/1.4906427
显示于类别:	[物理學系暨研究所] 期刊論文

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