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Field electron emission from carbon-containing thin films 含碳薄膜的场电子发射
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300687
Jian Chen, A. Wei, H. Zhang, Y. Lu, Xiangyang Zheng, D. Mo, S. Peng, N. Xu
{"title":"Field electron emission from carbon-containing thin films","authors":"Jian Chen, A. Wei, H. Zhang, Y. Lu, Xiangyang Zheng, D. Mo, S. Peng, N. Xu","doi":"10.1117/12.300687","DOIUrl":"https://doi.org/10.1117/12.300687","url":null,"abstract":"Details are given of an experimental study of field electron emission phenomenon associated with two types of carbon containing thin film, i.e. non-doped fullerene C60 and amorphous diamond films. A transparent anode imaging technique was used to record the spatial distribution of individual emission sites and the total emission current-voltage (I-V) characteristic of the films. This study has revealed that stable electron emission can be obtained from both types of film at fields as low as 3 - 6 MV/m. A quasi-direct tunneling model is proposed to explain the observed emission.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"85 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":"125105096","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
Impurity process in ZnCdSe/ZnSe multiple quantum wells ZnCdSe/ZnSe多量子阱中的杂质过程
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300718
Guangyou Yu, Xiwu Fan, Jiying Zhang, Bao-jun Yang, Zhuhong Zheng, Xiaowei Zhao, D. Shen, Youming Lu, Z. Guan
{"title":"Impurity process in ZnCdSe/ZnSe multiple quantum wells","authors":"Guangyou Yu, Xiwu Fan, Jiying Zhang, Bao-jun Yang, Zhuhong Zheng, Xiaowei Zhao, D. Shen, Youming Lu, Z. Guan","doi":"10.1117/12.300718","DOIUrl":"https://doi.org/10.1117/12.300718","url":null,"abstract":"At high excitation intensity the photoluminescence (PL) spectra of ZnCdSe/ZnSe multiple quantum wells were studied, which showed strong excitonic emission and a broad emission band at low energy side. The dependence of the broad emission band on excitation intensity shoed obviously that the broad emission band is related to impurity. In time resolved luminescence spectra, with increasing the delay times (ns), the broad emission band shifts to low energy side and full width at half maximum decreased, which showed the typical characteristic of donor-acceptor pairs (DAP) emission. And then, the reason that the excitonic emission peak and the DAP band decay with same speed was discussed and it was attributed to the free carriers relax effect.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"50 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":"115038039","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
Stimulated emission under photopumping in ZnSe-based MQWs grown by AP-MOCVD AP-MOCVD生长znse基MQWs的光泵浦激发发射
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300672
Xiwu Fan, Z. Guan, D. Shen, Jiying Zhang, Zhuhong Zheng, Bao-jun Yang
{"title":"Stimulated emission under photopumping in ZnSe-based MQWs grown by AP-MOCVD","authors":"Xiwu Fan, Z. Guan, D. Shen, Jiying Zhang, Zhuhong Zheng, Bao-jun Yang","doi":"10.1117/12.300672","DOIUrl":"https://doi.org/10.1117/12.300672","url":null,"abstract":"Blue-green and blue stimulated emission under photopumping in Zn0.8Cd0.2Se-ZnSe and ZnSe-ZnS multiple quantum wells (MQWs) on (100) GaAs substrate grown by atmospheric pressure metalorganic chemical vapor deposition (AP-MOCVD) have been investigated, respectively. For the Zn0.8Cd0.2Se-ZnSe MQWs, the stimulated emission of the sample with different cavity length is observed at 77K, two groups of stimulated emission lines observed are attributed to n equals 1 heavy- hole (hh) and light-hole (lh) exciton transition, respectively, and it is noticed that the sample with the shorter Fabry-Perot cavity length has the larger threshold excitation and more mode spacing. For the ZnSe-ZnS MQWs, the blue stimulated emission is observed and attributed to the exciton-exciton interactions.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"245 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":"129957881","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
Optical nonlinearity of the films from hybrid and nanocomposite materials 杂化和纳米复合材料薄膜的光学非线性
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300649
F. Gan
{"title":"Optical nonlinearity of the films from hybrid and nanocomposite materials","authors":"F. Gan","doi":"10.1117/12.300649","DOIUrl":"https://doi.org/10.1117/12.300649","url":null,"abstract":"The preparation, measurement and recent experimental results of hybrid and nanocomposite nonlinear optical materials have been reported. The approaches for increasing optical nonlinearity of hybrid and nanocomposite materials are discussed. The optical limiting effects are demonstrated.","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":"128403119","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
Optical gas sensing of hematin Langmuir-Blodgett films 血液Langmuir-Blodgett薄膜的光学气体传感
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300641
M. Salleh, A. Belal, M. Yahaya
{"title":"Optical gas sensing of hematin Langmuir-Blodgett films","authors":"M. Salleh, A. Belal, M. Yahaya","doi":"10.1117/12.300641","DOIUrl":"https://doi.org/10.1117/12.300641","url":null,"abstract":"This paper reports the use of hematin Langmuir-Blodgett (LB) films to detect carbon monoxide gas at the room temperature, based on changes in the optical absorption of the films. Hematin LB films were deposited on quartz and glass substrates. For the film deposited on quartz substrate, an increase in the absorption spectra of the film was achieved by exposing the film to carbon monoxide gas. The absorption spectra of the film recover back when the exposing gas was cut off. While for the film deposited on glass substrate, there is no significant change in the spectra due to this gas. Atomic force microscope images were taken for the hematin LB films both on glass and quartz substrates. Both images show different features indicating that the optical respond of the films to the gas depends on the arrangement of molecules on the substrate.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"28 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":"127708512","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
Characteristic of surface layer of periodic segment proton-exchanged and annealed LiTaO3 周期段质子交换退火LiTaO3的表层特性
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300653
Yushan Li, Shaojie Ma, K. Tada
{"title":"Characteristic of surface layer of periodic segment proton-exchanged and annealed LiTaO3","authors":"Yushan Li, Shaojie Ma, K. Tada","doi":"10.1117/12.300653","DOIUrl":"https://doi.org/10.1117/12.300653","url":null,"abstract":"Proton-exchanged and annealed film in z-cut LiTaO3 with and without the periodic segment are fabricated. The refractive index, lattice constant, proton concentration, and infrared absorption spectrum of samples are measured by prism coupling, x-ray rocking, SIMS, and spectrometer, respectively. The refractive index increase and the change in lattice constant of the surface layer are noticed during the annealed process.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"4 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":"115815613","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
Dispersion characteristics of magnetic spatial solitons on the surface of an antiferromagnet 反铁磁体表面磁性空间孤子的色散特性
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300693
Qi Wang, Li-qiang Wang
{"title":"Dispersion characteristics of magnetic spatial solitons on the surface of an antiferromagnet","authors":"Qi Wang, Li-qiang Wang","doi":"10.1117/12.300693","DOIUrl":"https://doi.org/10.1117/12.300693","url":null,"abstract":"The dispersion characteristics of magnetic spatial solitons on an antiferromagnetic slab have been studied in this paper. The guided spatial soliton is on the plane interface between an antiferromagnetic slab and a semi-infinite linear dielectric. The distinguishing feature of the soliton is the existence of its frequency passband(s) and stopband(s) that can be switched into each other by varying the power.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"51 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":"133989196","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
Electric potential distribution of metal-metal junction 金属-金属接点的电位分布
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300725
Yu Shen, Baocheng Yang
{"title":"Electric potential distribution of metal-metal junction","authors":"Yu Shen, Baocheng Yang","doi":"10.1117/12.300725","DOIUrl":"https://doi.org/10.1117/12.300725","url":null,"abstract":"In this paper, we give the equation for the distribution function of electric potential on the metal-metal junction. By perturbation method, we get the distribution function of electric potential when the difference of Fermi energies of these two metals is very small.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"6 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":"131645271","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
Intersubband energies of two-dimensional electron gases in GaAs/AlGaAs heterojunction determined by resonant subband-Landau-level coupling 用共振子带朗道能级耦合确定GaAs/AlGaAs异质结中二维电子气体的子带间能量
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300712
Zhanghai Chen, Can-Ming Hu, Pu-lin Liu, G. Shi, Xue-chu Shen
{"title":"Intersubband energies of two-dimensional electron gases in GaAs/AlGaAs heterojunction determined by resonant subband-Landau-level coupling","authors":"Zhanghai Chen, Can-Ming Hu, Pu-lin Liu, G. Shi, Xue-chu Shen","doi":"10.1117/12.300712","DOIUrl":"https://doi.org/10.1117/12.300712","url":null,"abstract":"Cyclotron resonance (CR) of two-dimensional electron gases (2DEG) in GaAs/AlGaAs heterojunction was studied by the gate voltage ratio spectrum measurement technique. The oscillation behaviors of the intensity of the CR peaks, the electron effective mass, scattering time and mobility obtained by fitting the CR line shape with the magnetic field due to the resonant subband Landau level coupling (RSLC) were observed. Several intersubband energies with high quantum index were measured by this RSLC method at different gate voltage. The results are in good agreement with the self-consistent calculations including the depolarization shift and the exciton effect correction.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"38 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":"115776069","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
Optical and electrical properties of a-Si1-xCx:H and uc-Si1-xCx:H films prepared by using methane and xylene source 甲烷和二甲苯源制备的a-Si1-xCx:H和uc-Si1-xCx:H薄膜的光学和电学性质
Thin Film Physics and Applications Pub Date : 1998-02-20 DOI: 10.1117/12.300726
T. Ma, Jun Xu, Li Wang, Xinfan Huang, J. Du, Wei Li, Kunji Chen
{"title":"Optical and electrical properties of a-Si1-xCx:H and uc-Si1-xCx:H films prepared by using methane and xylene source","authors":"T. Ma, Jun Xu, Li Wang, Xinfan Huang, J. Du, Wei Li, Kunji Chen","doi":"10.1117/12.300726","DOIUrl":"https://doi.org/10.1117/12.300726","url":null,"abstract":"Hydrogenated amorphous silicon carbide (a-Si1-xCx:H) films were fabricated in the plasma-enhanced chemical vapor deposition system by using silane (SiH4) and two kind of carbon sources, methane (CH4) and xylene (C8H10), respectively. The optical band gap of methane-made a-Si1- xCx:H was varied from 1.9 eV to 2.6 eV while that of xylene-made a-Si1-xCx:H could be extended to 3.5 eV. Fourier transform infrared spectra demonstrated the existence of aromatic ring in xylene-made a-Si1-xCx:H, which is much different from the carbon configuration of methane-made a-Si1-xCx:H. Visible light emission at room temperature was observed from xylene-made a-Si1-xCx:H films. The photoluminescence peak shifted from 630 nm (1.97 eV) to 450 nm (2.75 eV) when the optical band gap of samples increased from 2.3 eV to 3.5 eV. KrF pulse laser with wavelength of 248 nm was used to crystallize these two kinds of films at room temperature. For both samples the conductivities can reach 10-5S/cm and are enhanced by over four orders of magnitude.","PeriodicalId":362287,"journal":{"name":"Thin Film Physics and Applications","volume":"27 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":"115126159","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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