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9th International Symposium on Electrets (ISE 9) Proceedings最新文献

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Nonlinear optical properties of Ge-SiO/sub 2/ thin films Ge-SiO/ sub2 /薄膜的非线性光学性质
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578126
L. Yue, Yizhen He
{"title":"Nonlinear optical properties of Ge-SiO/sub 2/ thin films","authors":"L. Yue, Yizhen He","doi":"10.1109/ISE.1996.578126","DOIUrl":"https://doi.org/10.1109/ISE.1996.578126","url":null,"abstract":"Nonlinear optical properties of Ge nanocrystallites embedded in SiO/sub 2/ (Ge-SiO/sub 2/) thin films prepared by the ion-beam sputtering technique have been studied by the Z-scan technique. The large values of nonlinear absorption coefficient and nonlinear refractive index of the samples were estimated respectively. Thus, the third-order optical nonlinear susceptibility /spl chi//sup 3 /obtained for Ge-SiO/sub 2/ thin film specimens is several orders of magnitude larger than that of the bulk Ge crystals. The results indicate that Ge-SiO/sub 2/ thin films showing enhanced optical nonlinearity have bright prospects as suitable nonlinear optical materials for optical function devices.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121651725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sol-gel preparation and optical properties of semiconductor doped silica glasses 半导体掺杂二氧化硅玻璃的溶胶-凝胶制备及其光学性能
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578095
W. Shi, Liang-ying Zhang, X. Yao
{"title":"Sol-gel preparation and optical properties of semiconductor doped silica glasses","authors":"W. Shi, Liang-ying Zhang, X. Yao","doi":"10.1109/ISE.1996.578095","DOIUrl":"https://doi.org/10.1109/ISE.1996.578095","url":null,"abstract":"Semiconductor (Zn/sub x/Cd/sub 1-x/S) doped silica glasses were prepared by sol-gel process and in-situ growth technique. The structure of the materials was characterized by X-ray diffraction technique, the particles size of semiconductor crystallites from X-ray patterns were estimated less than 10 nm. From absorption spectra, we obtained that the absorption edges shifted to short wavelength direction when Zn contents increased, and the absorption edge can be adjusted from 2.46 eV to 2.96 eV by controlling Zn contents. The third-order nonlinear optical susceptibility was studied at 532 nm with 8 ns pulse laser by degenerate four wave mixing (DFWM) technique.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125628098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polaronic effects in disordered dielectrics 无序介质中的极化子效应
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578050
S. D. Khanin
{"title":"Polaronic effects in disordered dielectrics","authors":"S. D. Khanin","doi":"10.1109/ISE.1996.578050","DOIUrl":"https://doi.org/10.1109/ISE.1996.578050","url":null,"abstract":"A number of experimental techniques for distinguishing small-polaronic hops from nonpolaronic hops in disordered dielectrics are presented. It is shown that the temperature and field dependencies of DC conductivity provide an indication of the small-polaronic (ultrasmall polarons) hops. For small-polaronic hops, a field dependence of DC conductivity exhibits a section where /spl sigma/ decreases with E prior to exponential increase in /spl sigma/. In the case of substances with ultrasmall polarons the temperature dependence of the electrical conductivity can be represented in the form ln (/spl sigma/T/sup 3/2/)/spl sim/T. The strong field polaronic effects take place in the lower frequency range up to boundary frequency which temperature dependence is determined by electron-lattice coupling strength. These results are in accord with observations in amorphous tantalum oxide for which there is explicit evidence of small-polaronic hopping.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133179827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The electrical and optical properties of the nonlinear optical polymer DR1/PMMA films 非线性光学聚合物DR1/PMMA薄膜的电学和光学性能
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578130
Hongyan Zhang, Z. Xia, Shiming Zhou, H. Ding, Yang Cao, Huamao Lin, Jianwei Zhu
{"title":"The electrical and optical properties of the nonlinear optical polymer DR1/PMMA films","authors":"Hongyan Zhang, Z. Xia, Shiming Zhou, H. Ding, Yang Cao, Huamao Lin, Jianwei Zhu","doi":"10.1109/ISE.1996.578130","DOIUrl":"https://doi.org/10.1109/ISE.1996.578130","url":null,"abstract":"The nonlinear optical material DR1/PMMA films were prepared by spin-coating method. The films were poled by constant voltage corona charging. Decay of surface potential was found to be slower at higher aging temperature (or poling) temperatures. The spectra of open-circuit (OC) and short-circuit (SC) TSD (Thermally Stimulate Discharge) were compared. One negative at 70/spl deg/C and one positive peaks at 100/spl deg/C were determined in open circuit TSD measurement. Only one negative broad peak appeared in short circuit TSD spectra. The OC first negative originated from the relaxation of polarization in the DR1/PMMA films, the second positive peak was due to the release of space charges. These two kinds of peaks usually emerge in polar materials. It indicated that the space charge was trapped to stabilize the polarization in polar materials. The second nonlinear optical effect and optical absorption in and near visible wavelength range was studied in the samples.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132310345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Polarization profiles in P(VDF-TFE) copolymer studied by PPS and LIMM methods 用PPS和LIMM方法研究了P(VDF-TFE)共聚物的极化谱
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578083
S. Fedosov, B. Ploss, G. Eberle, W. Eisenmenger
{"title":"Polarization profiles in P(VDF-TFE) copolymer studied by PPS and LIMM methods","authors":"S. Fedosov, B. Ploss, G. Eberle, W. Eisenmenger","doi":"10.1109/ISE.1996.578083","DOIUrl":"https://doi.org/10.1109/ISE.1996.578083","url":null,"abstract":"Summary form only given. In this paper we report how the PPS and LIMM methods were applied to study distribution of polarization in RT poled 95/5 P(VDF-TFE) films of 20 /spl mu/m thickness. The samples were poled either in a corona triode, or by direct application of high poling field. Our results confirm that polarization is non-uniformly distributed if moderate poling field of about 60 MV/m is applied independently on the method of poling.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"4 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114041911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Charge-dipole interaction in polymer electrets 聚合物驻极体中的电荷-偶极相互作用
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578212
W. Eisenmenger
{"title":"Charge-dipole interaction in polymer electrets","authors":"W. Eisenmenger","doi":"10.1109/ISE.1996.578212","DOIUrl":"https://doi.org/10.1109/ISE.1996.578212","url":null,"abstract":"The nature of charge-dipole interactions in polymers can be studied by many experimental techniques. Some of these techniques and their results are discussed with respect to their potential to distinguish between the importance of either dipoles or charges or their interaction with respect to the properties and physical characteristics of polymer electrets. PVDF and the copolymer P(VDF/TrFe), as in some respect representative examples, are the basis of the discussion.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116288092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
The dielectric time domain differential spectroscopy of polyethylene terephthalate 聚对苯二甲酸乙二醇酯的介电时域微分光谱
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578076
Xin-gui Tang, Yang-yu Fan, Yanyang He, Zhen-fang Tang
{"title":"The dielectric time domain differential spectroscopy of polyethylene terephthalate","authors":"Xin-gui Tang, Yang-yu Fan, Yanyang He, Zhen-fang Tang","doi":"10.1109/ISE.1996.578076","DOIUrl":"https://doi.org/10.1109/ISE.1996.578076","url":null,"abstract":"Studies of dielectric time domain differential spectroscopy in thermodynamically equilibrium state for polyethylene terephthalate (PET) film samples are reported. The experimental results show that the response function is F/sub n/=exp[-(t//spl tau//sub n/)/spl alpha/(n)] with and two typical value of /spl alpha//sub n/ are /spl alpha//sub n/=1 and /spl alpha//sub n/=1/2 in low temperature condition; the line of time domain spectroscopy split up in high temperature condition and the /spl tau//sub n/(n>1) of slow response can increase as the temperature rising. A model that free diffusion of the unequilibrium binding space charge can describe the discharge relaxation process of PET film is suggested.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"378 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116384253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dielectric study of the hydration mechanism in plant seeds 植物种子水化机理的介电介质研究
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578198
A. Konsta, P. Pissis, J. Laudát
{"title":"Dielectric study of the hydration mechanism in plant seeds","authors":"A. Konsta, P. Pissis, J. Laudát","doi":"10.1109/ISE.1996.578198","DOIUrl":"https://doi.org/10.1109/ISE.1996.578198","url":null,"abstract":"Part of our recent results concerning the investigation of the hydration mechanism in plant seeds, with a) sorption and desorption studies, b) ac dielectric spectroscopy in the 5 Hz-1 GHz frequency range and c) thermally stimulated currents techniques are described. According to our findings, water in seeds seems to freeze only for concentrations higher than a critical value, whereas for lower hydration it undergoes a glass-like transition, the temperature of which is strongly dependent on the water content of the sample. This glass transition is accompanied by a marked increase of the dc conductivity, the carriers of which are mainly protons, which occurs only after completion of the proton percolation threshold. The biological implications of these findings are discussed.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132147687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Monte Carlo calculation for two-dimensional polarization model of bioelectret 生物驻极体二维极化模型的蒙特卡罗计算
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578203
Z. Yuxiang, W. Yi, Gan Chaoqing, W. Zonghan
{"title":"Monte Carlo calculation for two-dimensional polarization model of bioelectret","authors":"Z. Yuxiang, W. Yi, Gan Chaoqing, W. Zonghan","doi":"10.1109/ISE.1996.578203","DOIUrl":"https://doi.org/10.1109/ISE.1996.578203","url":null,"abstract":"We have studied the properties of polarisation in a bioeletret by using Monte Carlo methods. First, the polarization model of the bioelectret is set up in imitation of the Ising model in magnetics. Secondly, using this model, we have calculated the temperature dependences of polarizations and polarizabilities of the bioelectret film. It is shown that there is a continuous phase transition which connects with the local field in bioelectrets.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128642674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The role of high pressure in the studies on some antibiotics 高压在某些抗生素研究中的作用
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578206
V.K. Farkya
{"title":"The role of high pressure in the studies on some antibiotics","authors":"V.K. Farkya","doi":"10.1109/ISE.1996.578206","DOIUrl":"https://doi.org/10.1109/ISE.1996.578206","url":null,"abstract":"The role of high pressures in studies on dielectric properties of two important antibiotic compounds has been discussed. These two important drugs in wafer forms were obtained through a specially prepared die through applications of different pressures ranging from 5 ton weight to 8 ton weight. The relaxation times of these two antibiotics i.e., streptomycin and terramycin vary in the range of 9.32 nsec to 10.62 nsec and 6.63 nsec to 14.47 nsec respectively. A model has been put forward which explains the mechanism or increase in the relaxation time related to the structure of these two complex molecules specially in the high frequency range of 10 MHz to 30 MHz.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125508170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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