共查询到20条相似文献,搜索用时 15 毫秒
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Crystallography Reports - Data on a new SRS-active Ca2Ga2SiO7 crystal, its Stokes and anti-Stokes χ(3)-nonlinear lasing in the visible region, and prospects of its use in self-SRS laser... 相似文献
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Ona Adomėnienė Povilas Adomėnas Antanas Gleiznys Aldona Beganskienė Lidija Poloudina Yasuyuki Gotoh 《Molecular Crystals and Liquid Crystals》2013,570(1):739-743
Abstract A synthesis of a number of 5-alkyl-2-pyrimidinol esters was conducted, their mesomorphic properties were examined. Two ring esters of said pyrimidinols are nonmesomorphic, while three ring esters are typical mesogens, forming nematic either nematic-smectic mesophases. 相似文献
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新型AgGa1-xInxSe2晶体用于CO2激光倍频研究 总被引:1,自引:0,他引:1
本实验室用布里奇曼方法成功生长出有应用前景的新型四元非线性AgGa1-xInxSe2晶体,对晶体光学透过,红外低倍显微成像,反射损耗和吸收系数进行了研究和计算.基于纯AgGaSe2和AgInSe2的Sellmeier方程,用线性内插方法计算了不同In含量的AgGa1-xInxSe2在0.9~19μm的Sellmeier色散系数并建立了Sellmeier方程.计算和描绘了Ⅰ型相位匹配CO2激光二次谐波产生的调谐曲线,并标出我们的倍频实验数据.在近似非临界相位匹配条件下,进行了TEA CO2激光10.6μm在AgGa1-xInxSe2中的倍频实验研究,并与AgGaSe2进行了比较,测量的1#AgGa1-xInxSe2相位匹配角θ及相位匹配接收外角△θext·L分别为88.2°和7.7°·cm,AgGa1-xInxSe2的倍频效率比AgGaSe2高出近3倍. 相似文献
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一种新型紫外非线性光学材料Ba2Be2B2O7 总被引:1,自引:1,他引:0
利用高温固相反应合成了一种新的非线性光学材料Ba2Be2B2O7(简称TBO),利用顶部熔盐籽晶法生长出了可供初步性能测试的TBO晶体,结构分析表明,TBO晶体的基本结构单元与SBBO(Sr2Be2B2O7)相同,并且均含有对非线性光学效应起主要作用的[BO3]基团,TBO的粉末倍频效应大约为KDP(KH2PO4)的2倍,TBO晶体的物理化学性质稳定,不吸潮,硬度适中,并且易于加工。 相似文献
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新型中、远红外波段非线性光学晶体磷化锗锌 总被引:6,自引:3,他引:3
中、远红外波段黄铜矿类半导体晶体磷化锗锌(ZnGeP2,ZGP)非线性系数、热导率、光损伤阈值高,在中、远红外波段的频率转换方面有广阔的应用前景,特别是其非线性系数是KDP的160倍,是已知非线性光学晶体中最高者之一.该晶体的生长及其应用研究正在逐渐引起各国政府和科研人员的高度重视,并成为材料与光电子(激光)领域的研究热点之一.本文全面综述了该晶体的物性与电光性能,以及多晶原料的合成与单晶的生长方法和其应用前景. 相似文献
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G. A. Gamal 《Crystal Research and Technology》1997,32(4):561-567
New technique for crystal growth was designed in the present work. The electrical conductivity and Hall effect of the TInS2 single crystals, grown by this technique, were measured in the temperature range 150–500 K. From the measurements, the conductivity type, the energy gap, ionization energy of the impurity level, Hall mobility and carrier concentration were determined. Also the measurements revealed a presence of phase transition in the crystal at 189 and 220 K. 相似文献
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K. Fichtner 《Crystal Research and Technology》1983,18(1):77-84
The thr notation is introduced to describe any stacking variant as a mixture of fractions of the three simplest or regular polytypes: 2H (trigonal), 4H (hexagonal), and 6R (rhombohedral). The new notation is compared with existing ones and applied to pairs of homometric structures and to the characterization of stacking faults. 相似文献
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钡镓锗硒(BaGa2GeSe6,BGGSe)晶体是由中国科学家发明的一种性能优异的新型红外非线性光学材料.目前国内未见到关于该晶体的大尺寸制备报道.本研究采用自制的双温区管式炉成功合成出BGGSe多晶,单次合成量达到400 g;采用坩埚下降法生长出大尺寸高质量BGGSe单晶,尺寸为φ30 mm×90 mm,为国内首次;通过定向、切割和抛光等处理工艺,成功制备出BGGSe晶体器件,为该晶体下一步的应用研究打下了坚实基础. 相似文献
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采用高温熔液法生长BaAlBO3F2晶体(简称BABF)时,组分挥发严重.本文分析了晶体生长前后的组分中相关元素的重量损失,发现易挥发的物质可能是硼的氧化物和氟化物;X射线衍射分析确定挥发物中还含有少量的NaCl.通过改变助熔剂与熔质的配比,明显降低了晶体的生长温度,减少了组分挥发,优化了晶体生长条件,得到24mm×20mm×6mm尺寸的晶体. 相似文献
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F. V. Motsnyi 《Molecular Crystals and Liquid Crystals》2013,570(2):521-526
Abstract The hydrazine intercalated lead iodide single crystal technology was developed. A new type of excitons named as interlayer excitons is described. The amplification of polariton emission (Sugakov's phenomenon) and the structure phase transition under intercalation are found and studied. 相似文献
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《Journal of Non》2007,353(18-21):1793-1797
The experimental work to be presented and analyzed here focuses on the investigation of the molecular hydrogen-bonded compound 2-biphenylmethanol in a supercooled liquid state using FT-IR spectroscopy measurements. In the IR spectra, some attributes of the beginning of a new crystalline phase formation, as the temperature is raised from the glass transition to the room temperature has been observed. At the room temperature a continuous transformation of the IR spectra, which is intimately related to the crystallization, extends over 60 min. The IR spectrum of the so produced crystalline phase has been found to be quite different from that of the stable phase. 相似文献