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Thin Film Physics and Applications最新文献

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Optical bistability in a ZnTe/CdZnTe multiple quantum well optical bistable device at room temperature 室温下ZnTe/CdZnTe多量子阱光双稳器件的光双稳性
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300719
Hongyu Li, D. Shen, Zhuhong Zheng, Jiuling Lin, Jiying Zhang
{"title":"Optical bistability in a ZnTe/CdZnTe multiple quantum well optical bistable device at room temperature","authors":"Hongyu Li, D. Shen, Zhuhong Zheng, Jiuling Lin, Jiying Zhang","doi":"10.1117/12.300719","DOIUrl":"https://doi.org/10.1117/12.300719","url":null,"abstract":"The band edge nonlinear absorption in ZnTe/CdZnTe multiple quantum wells (MQWs) is studied at room temperature. It is found that the exciton absorption peak tends to saturate, broaden and the absorption edge shift to lower energy side with increasing of pump intensities. The optical bistability in ZnTe/CdZnTe MQWs optical bistable device is investigated on transmission at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in ZnTe/CdZnTe MQWs optical bistable device are about 292.5 kW/cm2 and 3:1, respectively.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128818502","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
Transition radiation effect in film or foil stack and short-wavelength free-electron lasers (FEL) 薄膜或箔堆和短波自由电子激光器中的跃迁辐射效应
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300646
Kefei Ruan, Zuqi Yan, G. Ji
{"title":"Transition radiation effect in film or foil stack and short-wavelength free-electron lasers (FEL)","authors":"Kefei Ruan, Zuqi Yan, G. Ji","doi":"10.1117/12.300646","DOIUrl":"https://doi.org/10.1117/12.300646","url":null,"abstract":"This paper discusses some questions about transition radiation effect in film or foil stack, analyses stimulated amplification of optical wave in film or foil stack. In this paper, authors research the possible model about transition radiation effect and ring crystal resonator apply to short wavelength FEL.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133603455","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
Giant magnetoresistance effect in granular-type Co-Ag/Ag multilayers 颗粒型Co-Ag/Ag多层膜中的巨磁阻效应
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300729
Rongjun Zhang, Liang-yao Chen, Shiming Zhou, Yu Wang, Bo Xu, D. Qian, Wei-Ming Zheng, Yuxiang Zheng
{"title":"Giant magnetoresistance effect in granular-type Co-Ag/Ag multilayers","authors":"Rongjun Zhang, Liang-yao Chen, Shiming Zhou, Yu Wang, Bo Xu, D. Qian, Wei-Ming Zheng, Yuxiang Zheng","doi":"10.1117/12.300729","DOIUrl":"https://doi.org/10.1117/12.300729","url":null,"abstract":"For the granular type of Co-Ag (1.8 nm)/Ag multilayers with the Co contents of 22, 45, and 65 at%, the magneto-resistance ratio ((Delta) R/R) has a maximum found with respect to the AG spacer layer thickness. It is found that with increasing Co content the (Delta) R/R peak shifts towards thicker AG layers. For the Co-Ag/Ag multilayers with low Co contents, (Delta) R/R increases monotonically with increasing magnetic layer thickness, but has a maximum near the magnetic layer thickness of 2.2 nm for the sample having a higher Co content. The peak is thought as a result of the antiferromagnetic (AFM) coupling between the nearest Co clusters in neighboring magnetic layers. In the high field region, the magnetization and the square root of (Delta) R/R vary as a linear function of the reciprocal applied field for all multilayers. In the low field range, they are proportional to the applied field for samples with thin magnetic layers.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116665091","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
Preparation and third order nonlinear optical property of rhodamine-6G-doped SiO2-TiO2 sol-gel thin films 罗丹明- 6g掺杂SiO2-TiO2溶胶-凝胶薄膜的制备及其三阶非线性光学性质
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300691
Xi-yan Zhang, Z. Cao, Kuisheng Yang, G. Long
{"title":"Preparation and third order nonlinear optical property of rhodamine-6G-doped SiO2-TiO2 sol-gel thin films","authors":"Xi-yan Zhang, Z. Cao, Kuisheng Yang, G. Long","doi":"10.1117/12.300691","DOIUrl":"https://doi.org/10.1117/12.300691","url":null,"abstract":"Sol-gel dip coating method was adopted to prepare Rhodamine-6G doped SiO2-TiO2 thin films. Effects of MTMS/TEOS ratio on the crack of the thin films during drying stage were studied. The cracking was greatly decreased with the increase of MTMS/TEOS ratio. Crack free thin films were obtained for the samples with MTMS/TEOS greater than 0.75. The optical absorption and fluorescence spectra of the thin films were recorded. The refractive index increases linearly with the increase of TiO2 content (20, 40, 60 mol%). The third order nonlinear susceptibility of the Rhodamine-6G doped SiO2-TiO2 thin films is (chi) (3) approximately equals 10-9 esu measured by the generate four wave mixing technique.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"249 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131565142","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: 3
Preparation and properties of Nb2O5-Fe2O3 sol-gel optical films Nb2O5-Fe2O3溶胶-凝胶光学薄膜的制备及性能研究
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300669
Yung-Yuan Wu, Lili Hu, Zhong-hong Jiang
{"title":"Preparation and properties of Nb2O5-Fe2O3 sol-gel optical films","authors":"Yung-Yuan Wu, Lili Hu, Zhong-hong Jiang","doi":"10.1117/12.300669","DOIUrl":"https://doi.org/10.1117/12.300669","url":null,"abstract":"In this paper, the homogeneous and transparent Nb2O5(x)-(1-x)Fe2O3(x equals 0, 0.6, 0.7, 0.8, 0.9, 1.0) films were prepared by sol-gel dip-coating method using metal alkoxide [Nb(OC2H5)5] and Fe(NO3) 9H2O as sol-gel precursors. Based on the reflectance spectra, the refractive indexes and thickness of the films were deduced. The electrochemical investigation of Li+ ions storage process in Nb2O5-Fe2O3 films has been made in a Pt/LiClO4-PC(1M)/Nb2O5-Fe2O3ITO cell between -2.0 V and 1.0 V potential range vs SCE. The total electric charge inserted and extracted during a cycle has been determined by the cyclic voltammetries. The electric charge transition ability is mainly influenced by the composition and heat treatment temperature. In pure Nb2O5 system, an orthorhombic crystalline phase presents after heat treated at 560 degrees Celsius for an hour.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133339666","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
Temperature dependence of porous silica antireflective (AR) coating 多孔硅抗反射涂层的温度依赖性
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300654
Yongxing Tang, Yueqin Le, Weiqing Zhang, M. Jiang, Jinren Sun, Xiaolin Liu
{"title":"Temperature dependence of porous silica antireflective (AR) coating","authors":"Yongxing Tang, Yueqin Le, Weiqing Zhang, M. Jiang, Jinren Sun, Xiaolin Liu","doi":"10.1117/12.300654","DOIUrl":"https://doi.org/10.1117/12.300654","url":null,"abstract":"In this paper, the antireflective coatings consisting of porous silica particles from a silica sol are applied by dip method. The relationships among composition, viscosity and temperature have been studied. The coating homogeneity is opium for the laser wavelengths of 1064 nm, 532 nm and 355 nm. The peak transmission of coated BK-7 glass substrate is higher than 99.5%. The laser induced damage thresholds of the antireflective coatings were range of 7 - 10 J/cm2, for 1 ns pulse width and 1064 nm wavelength. These damage thresholds were suitable for our national ICF program. It is noted that the optical homogeneity of coating and the viscosity of coating sol were strongly influenced by the temperatures in the duration of sol ripening.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122527910","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
Room-temperature excitonic optical properties in ZnSe-ZnS/GaAs multiple quantum wells ZnSe-ZnS/GaAs多量子阱的室温激子光学性质
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300723
D. Shen, Hongyu Li, Jiying Zhang, Xiwu Fan
{"title":"Room-temperature excitonic optical properties in ZnSe-ZnS/GaAs multiple quantum wells","authors":"D. Shen, Hongyu Li, Jiying Zhang, Xiwu Fan","doi":"10.1117/12.300723","DOIUrl":"https://doi.org/10.1117/12.300723","url":null,"abstract":"Excitonic optical bistability with nanosecond switching time in ZnSe-ZnS multiple quantum wells (MQWs) with a Fabry-Perot (FP) cavity is investigated at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in ZnSe-ZnS MQWs with a FP cavity are about 0.2 MW/cm2 and 6:1, respectively. On the basis of the room temperature excitonic absorption spectra obtained here, we attribute the major nonlinear mechanism for the optical bistability to the excitonic saturating absorption due to phase space filling of excitonic states and excitonic band broadening.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123979644","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
Exchange coupling in magnetic superlattices 磁超晶格中的交换耦合
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300656
H. Zabel
{"title":"Exchange coupling in magnetic superlattices","authors":"H. Zabel","doi":"10.1117/12.300656","DOIUrl":"https://doi.org/10.1117/12.300656","url":null,"abstract":"Artificial magnetic superlattices composed of successive ferromagnetic and paramagnetic layers have received much attention in recent years due to their scientific and technological relevance. While the strength of the exchange coupling and the oscillation period depend on the details of the Fermi surfaces involved, the overall features appear universal. More complex couplings are observed for magnetic superlattices with chromium spacer layer. This is due to the intrinsic spin density wave of Cr. Extensive synchrotron and neutron scattering experiments have now unraveled the Neel- state of thin Cr layers and proximity effects between Fe and Cr, elucidating the mutual interdependence of Cr spin structure and Fe exchange coupling. In Co/Cr superlattices the structural mismatch between hcp Co and bcc Cr adds another complexity, which affects strongly the magnetic anisotropy. Both, the current status and understanding of the exchange coupling in Fe/Cr(001) and Co/Cr(001) superlattices is briefly reviewed here.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128187346","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
Simulation and testing of a vertical organometallic vapor phase epitaxy reactor 垂直有机金属气相外延反应器的模拟与测试
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300675
R. Sani, M. Barmawi, J. Y. Mindara
{"title":"Simulation and testing of a vertical organometallic vapor phase epitaxy reactor","authors":"R. Sani, M. Barmawi, J. Y. Mindara","doi":"10.1117/12.300675","DOIUrl":"https://doi.org/10.1117/12.300675","url":null,"abstract":"The purpose of the study is to design a single wafer vertical organo-metallic vapor phase epitaxy (OMVPE) reactor which gives a uniform deposition around the symmetry axis. The vertical reactor under the consideration consist of a diffuser and a system of coaxial cylinders to laminarize the flow which may lead to a uniform deposition without rotating the susceptor. The simulation shows that for a susceptor with a radius of 2.5 cm, a uniformity can be achieved in a region of a radius of 2 cm within 1% for certain operating condition. The result is compared with the experimental measurement of TiO2 deposition from TTIP.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123595448","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
Influence of solution concentration on controlled crystallization of calcium phosphate 溶液浓度对磷酸钙控制结晶的影响
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300706
C. Ma, F. Qian, H. B. Lu
{"title":"Influence of solution concentration on controlled crystallization of calcium phosphate","authors":"C. Ma, F. Qian, H. B. Lu","doi":"10.1117/12.300706","DOIUrl":"https://doi.org/10.1117/12.300706","url":null,"abstract":"To investigate the influence of solution concentration on controlled crystallization of calcium phosphate, controlled crystallization in the presence of stearic acid monolayer from solutions of hydroxyapatite with different [Ca2+] have been studied by SEM, TEM with ED, IR, XRD. When [Ca2+] is 0.4 mM, octacalcium phosphate (OCP) which is a thermodynamically undersaturated phase in this condition precipitates due to the 'concentration effect' of charged headgroup -COO- of stearic monolayer to Ca2+ in the solution; while solution is supersaturated in which [Ca2+] is 4 mM, the first precipitates phase is hydroxyapatite (HAP) with (0001) parallel to the surface of stearic monolayer. Subsequent growth results in oriented OCP crystals, and all the crystals show a white semi- globular characters; while [Ca2+] is up to 5 mM, the increasing of mineralization rate results to the rapid nucleation of HAP into some core-like structure and the later growth of platelet-like OCP as the 'shell.' Nucleation of DCPD between OCP showing a flower-like structure also found at LB film/solution interface. The mechanism of influence of concentration was discussed.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124687707","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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