杨中民
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- 姓名:杨中民
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
材料科学基础学科
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杨中民教授,男,1971年11月生,河北武邑人,工学博士,华南理工大学副教授,博士生副导师。入选2004年教育部“新世纪优秀人才”支持计划。国外Journal of Non-Crystalline Solids(美国)、Journal of Materials Science(美国)、Optical Materials(美国)、Philosophical Magazine(英国)Material Letters(日本)期刊和国内期刊《中国物理快报》、《光学学报》、《中国激光》、《光学快报》(英文版)和《材料科学与工艺》(英文版)的审稿人。曾主持和主要参与完成3项国家自然科学基金、6项省部级项目以及2项重大军工项目的研究工作。现主持国家自然科学基金“包层泵浦玻璃光纤上转换荧光的研究(60307004)”、广东省自然基金重点项目“掺稀土主动光纤研究(013013)”和教育部新世纪优秀人才项目(NCET- NCET-04-0821)。已在国内外知名刊物Chemical Physics Letters、Journal of the Optical Society of America B、Journal of Materials Research、科学通报上发表论文58篇,其中SCI收录38篇(第一、第二作者)。申请专利9项,授权2项。获全国百篇优秀博士论文提名,2003年获湖北省自然科学一等奖。
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成果数
16
杨中民, Shiqing Xu a, b, *, Zhongmin Yang a, Shixun Dai a, Guonian Wang a, Lili Hu a, Zhonghong Jiang a
Journal of Non-Crystalline Solids 347(2004)197-203,-0001,():
-1年11月30日
The spectroscopic properties of Er3+-doped lead oxyfluorosilicate glasses were analyzed with Judd-Ofelt and McCumber theories. The obtained data suggest that the fluorescence full width at half maximum (FWHM) is related to the X6 parameter, the larger the X6 parameter, and the broader the FWHM. The results showed that Er3+-doped 45SiO2-5Bi2O3-50PbF2 glass had the broadest FWHM (64nm) and large stimulated emission cross-section (0.73×10-20cm2) in these glass samples. Compared with other glass hosts, the gain bandwidth properties of Er3+-doped 45SiO2-5Bi2O3-50PbF2 glass is close to those of tellurite and bismuth glasses, and has advantage over those of silicate, phosphate and germante glasses. The results suggest that Er3+-doped 45SiO2-5Bi2O3-50PbF2 glass can be used as potential host material for developing broadband optical amplifiers in wavelength-division-multiplexingnetwork system.
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杨中民, 姜中宏
,-0001,():
-1年11月30日
研究了Yb3+/Er3+共掺锗碲酸盐玻璃在980nmLD抽运下的上转换发光光谱,发现随着碱金属离子半径的增大,上转换发光强度明显增强。基质玻璃的Raman光谱显示:玻璃的最大声子能量并不随碱金属氧化物之间的取代而发生变化,表明最大声子能量并不是锗碲玻璃上转换发光强度增大的原因。从玻璃无辐射跃迁的角度分析表明:最大能量声子密度的降低是影响Yb3+/Er3+共掺锗碲玻璃上转换发光强度增大的主要原因。
玻璃, 上转换, 碱金属离子, 声子能量
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【期刊论文】Thermal analysis and optical properties of Yb31' Er31-codoped oxyfluoride germanate glasses
杨中民, Zhongmin Yang, Shiqing Xu, Lili Hu, and Zhonghong Jiang
J. Opt. Soc. Am. B/Vol. 21, No.5/May 2004,-0001,():
-1年11月30日
Yb31/Er31-codoped Na2O-Al2O3-GeO2-PbO-PbF2 glasses that are suitable for use in fiber lasers, amplifiers, and waveguide devices have been fabricated and characterized. The density, refractive indices, optical absorptions, Judd-Ofelt parameters, and spontaneous-transition probabilities of the glasses have been measured and calculated. Intense and broad 1.53-mm infrared fluorescence and visible upconversion luminescence were observed under 976-nm diode laser excitation. For the 1.53-mm emission band, the full widths at the halfmaximum increase and the peak wavelengths are blueshifted with an increase of PbF2. The stimulatedemission cross sections were calculated from the measured-absorption cross section according to the McCumber theory. The monotonically reduced emission cross section arises from the decreased refractive indices of glasses and the increased linewidth of the infrared fluorescence spectrum. For the upconversion emissions centered at 524, 547, and 660nm, the emission intensity changes remarkably with PbF2 contents from 0 to 15mol%. The quadratic dependence of the green and red emissions on excitation power indicates that a twophoton absorption process occurs under the 976-nm excitation. The relatively long lifetimes of the Er31 4S3/2 and 4F9/2 levels for the NAGF3 glass gives rise to a much more intense upconversion emission.
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【期刊论文】Photo-induced refractive index change of bismuth-based silicate glass
杨中民, Zhongmin Yang, , Qinyuan Zhang, and Zhonghong Jiang
J. Phys. D: Appl. Phys. 38(2005)1461-1463,-0001,():
-1年11月30日
We report the ultraviolet laser-induced absorption spectra and refractive index changes in bismuth-based silicate glass. A positive maximum refractive index change of 6×10−4 has been observed in bismuth-based silicate glass upon exposure to a pulsed 248nm KrF excimer laser. It is also seen that the changes in the absorbance and refractive index are strongly dependent on glass melting onditions.
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【期刊论文】Theoretical study on two sedimentation processes used to form functionally graded materials
杨中民, Z. M. YANG*, F. TIAN, L. M. ZHANG
,-0001,():
-1年11月30日
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【期刊论文】Upconversion fluorescence spectroscopy of Er3+/Yb3+-codoped lead oxyfluorosilicate glass
杨中民, Shiqing Xu*, Zhongmin Yang, Junjie Zhang, Guonian Wang, Shixun Dai, Lili Hu, Zhonghong Jiang
Chemical Physics Letters 385(2004)263-267,-0001,():
-1年11月30日
Upconversion fluorescence properties of a new Er3þ/Yb3þ-codoped lead oxyfluorosilicate glass under 975 nm excitation areinvestigated. The blue, intense green and red emissions centered at 408, 529, 545, and 667nm, corresponding to the 2H9/2→4I15/2, 2H11/2→4I15/2, 4S3/2→4I15/2, and 4F9/2→4I15/2 transitions of Er3+, respectively, were simultaneously observed at room temperature. The important role of Yb2O3 in upconversion intensity is observed, and the influence of Yb2O3 and PbF2 on blue, green and red emissions is compared and discussed. The dependence of upconversion intensities on excitation power and possible upconversion mechanisms are evaluated.
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杨中民, Shiqing Xu, Zhongmin Yang, Guonian Wang, Shixun Dai, Junjie Zhang, Lili Hu, Zhonghong Jiang
Journal of Alloys and Compounds 377(2004)253-258,-0001,():
-1年11月30日
Er3+-doped heavy metal oxyfluoride germanate glass suitable for developing potential optical amplifiers and upconversion lasers has been fabricated and characterized. Under 975nm excitation, intense and broad 1533nm infrared fluorescence and visible upconversion fluorescence were observed. For 1533nm emission band, the full width at half maximum (FWHM) is 57nm, the fluorescence lifetime is 5.7ms, and the quantum efficiency is-100%. Efficient 529, 551, and 657nm upconversion emissions correspond to the transitions 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, and 4F9/2 → 4I15/2, respectively. Raman spectrum indicates the important role of fluoride ions in the formation of glass network. The dependence of upconversion intensities on excitation power involves two-photon absorption processes for the three emission bands. The possible upconversion mechanisms are discussed based on the energy matching conditions and the quadratic dependence on excitation power.
Rare-earth doped glasses, Optical materials, Optical spectroscopy, Upconversion spectroscopy
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杨中民, Shiqing Xu, Zhongmin Yang, Shixun Dai, Jianhu Yang, Lili Hu, Zhonghong Jiang
Journal of Alloys and Compounds 361(2003)313-319,-0001,():
-1年11月30日
Er3+-doped 50SiO2-(502x) PbO-xPbF glasses were prepared. The effect of PbF content on refractive indices, densities, absorptionspectra, the Judd-Ofelt parameters Ωt (t52,4,6), fluorescence spectra and the lifetimes of I level of Er in 50SiO2-(502x) PbO-t13-2xPbF glasses were investigated, and the stimulated emission cross-section was calculated from McCumber theory. With increasing PbF2 content in the glass composition, the V parameter, fluorescence full width at half maximum (FWHM) and lifetimes of I level of Ω6 Er increase, while refractive indices and densities decrease. Compared with other glass hosts, the gain bandwidth properties of 31 Er-doped 50SiO2-50PbF glass is close to those of tellurite and bismuth glasses, and has an advantage over those of silicate, phosphateand germante glasses. The broad and flat → emission of Er around 1.55mm can be used as host material for potential broadband optical amplifier in the wavelength-division-multiplexing (WDM) network system.
Rare earth compounds, Optical materials, Thermal analysis, Optical spectroscopy
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【期刊论文】Density of Na2O-(3-x)SiO2-xGeO2 glasses related to structure
杨中民, Zhongmin Yang*, Shiqing Xu, Lili Hu, Zhonghong Jiang
Materials Research Bulletin 39(2004)217-222,-0001,():
-1年11月30日
In order to elucidate the short-rang order structure in the ternary system Na2O-(3-x) SiO2-xGeO2 we employ in this study a quantitative description to determine the molar ratios of Na2O to SiO2 (RSi) and Na2O to GeO2 (RGe) in sodium germanosilicates. The calculated results show that the sodium oxide has no preference for the silicate or the germanate part of the network and there are the same short-rang order units in various Na2O-(3-x) SiO2-xGeO2 glasses. The Raman spectra also confirm the calculated results.
A., Glasses, A., Optical materials, D., Microstructure
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【期刊论文】Upconversion emission in multi-doped glasses for full colour display
杨中民, Zhongmin Yang, Zhouming Feng and Zhonghong Jiang
J. Phys. D: Appl. Phys. 38(2005)1629-1632,-0001,():
-1年11月30日
Upconversion luminescence characteristics of a multi-rare-earth-doped 0.05K2O-0.1ZnO-0.1BaO-0.2PbO-0.2GeO2-0.35TeO2 glass have been investigated under 976nm excitation for potential use in full colour displays.Two luminescence ions, Er3+ and Tm3+, were used as blue, green and red emitters to control the colour of the emitted light. Sensitizer ions, Yb3+, were used to increase the upconversion emission intensity. With the substitution of Er3+ for Tm3+, the intensities of the blue, green and 657nm upconversion emissions simultaneously increase.
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