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Quantum secret sharing between m-party and n-party with six states

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Science China(Physics,Mechanics & Astronomy) 2009年第8期52卷 1191-1202页

作者： GAO Ting1,YAN FengLi2.3 & LI YouCheng2.3 1 College of Mathematics and Information Science,hebei Normal University,shijiazhuang 050016,China 2.College of Physics and Information Engineering,hebei Normal University,shijiazhuang 050016,China 3 hebei advanced thin films laboratory,shijiazhuang 050016,China College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 China College of Physics and Information Engineering Hebei Normal University Shijiazhuang 050016 China hebei advanced {2. films laboratory Shijiazhuang 050016 China

A quantum secret sharing scheme between an m-party group and an n-party group is proposed using three conjugate bases.A sequence of single photons,each of which is prepared in one of the six states,is used directly to encode classical information in the quantum secret sharing *** this scheme,each of all m members in group 1 chooses randomly his/her own secret key individually and independently,and directly encodes his/her respective secret information on the states of single photons via unitary operations,then the last one sends 1/n of the resulting qubits to each member of group *** measuring their respective qubits,all members in group 2.share the secret information shared by all members in group *** renders impossible a Trojan horse attack with a multi-photon signal,a fake-signal attack with EPR pairs,an attack with single photons,and an attack with invisible *** give the upper bounds on the average success probabilities for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing security EPR pairs

Effects of annealing on structural, optical and electrical properties of Al-doped ZnO thin films

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Science China(Physics,Mechanics & Astronomy) 2004年第5期47卷 588-596页

作者： CHEN Yanwei1,2. YU Wenhua1 & LIU Yichun1,2.1. Centre for advanced Optoelectronic Functional Material Research, Northeast Normal University, Changchun 13002., China 2. Key laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 13002., China 1. Centre for advanced Optoelectronic Functional Material Research Northeast Normal University 130024 Changchun China 2. Key laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences 130021 Changchun China

In this paper, the structural, electrical and optical properties of Al-doped zinc oxide (ZnO: Al) thin films onto quartz substrates prepared by electron beam evaporation technique were studied. All samples are polycrystal with a hexagonal structure andc-axis preferred orientation. The intense UV emissions and weak deep-level green emissions were observed. The films show high transparency, conductivity and high carrier concentration. Van der Pauw measurements show that the films are n-type degenerate semiconductor. The lowest resistivity is 6.7×10?4 Ω⊙cm at room temperature. These films exhibit a carrier density above 102. cm?3. The conduction mechanism was discussed. The behavior of metallic conduction can be observed in the high temperature range.

关键词： ZnO: Al thin film, photoluminescence, electrical properties, structural properties, Van der Pauw measurement.

Influence of p-layer on the performance of n-i-p μc-Si:H thin film solar cells

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Science China(Physics,Mechanics & Astronomy) 2010年第11期53卷 2042-2046页

作者： YUAN YuJie 1,2.ZHANG KaiLiang 1,2.WEI Zhen 1,2.& GENG XinHua 3 1 College of Electronics Information Engineering,Tianjin University of Technology,Tianjin 300384,China 2.Tianjin Key laboratory of Film Electronic and Communication Devices,Tianjin University of Technology,Tianjin 300384,China 3 Institute of Photo-Electronics thin Film Devices and Technique,Nankai University,Tianjin 300071,China 1. College of Electronics Information Engineering Tianjin University of Technology Tianjin 300384 China2. Tianjin Key Laboratory of Film Electronic and Communication Devices Tianjin University of Technology Tianjin 300384 China3. Institute of Photo-Electronics Thin Film Devices and Technique Nankai University Tianjin 300071 China

The high pressure radio frequency plasma enhanced chemical vapor deposition (RF-PECVD) process was adopted to prepare the n-i-p microcrystalline silicon solar cells,the influence of p-type layers on the performance of the solar cells was investigated,and the optimum p layer suited to the n-i-p microcrystalline silicon solar cells was *** experimental results demonstrate that the performance of the solar cells can be highly affected by the structural and optical properties of the p-layers,and the performance of solar cells can be greatly improved by optimizing p *** have achieved an initial active-area efficiency of 8.17% (V oc =0.49 V,J sc =2..9 mA/cm 2.,FF=67%) for the μc-Si:H single-junction n-i-p solar cells and an initial active-area efficiency of 10.93% (V oc =1.31 V,J sc =13.09 mA/cm 2.,FF=64%) for the a-Si:H/μc-Si:H tandem n-i-p solar cells.

关键词： microcrystalline silicon solar cells quantum confinement effect p-type layers

Optimization of Laser Ablation Technology for PDPhSM Matrix Nanocomposite thin Film by Artificial Neural Networks-particle Swarm Algorithm

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Journal of Wuhan University of Technology(Materials Science) 2010年第2期25卷 188-193页

作者：唐普洪宋仁国 The MOE Key laboratory of Mechanical Manufacture and Automation Zhejiang University of Technology Jiaxing Vocational Technical College

A new thermal ring-opening polymerization technique for 1, 1, 3, 3-tetra-ph enyl-1, 3-disilacyclobutane （TPDC） based on the use of metal nanoparticles produced by pulsed laser ablation was investigated. This method facilitates the synthesis of polydiphenysilylenemethyle （PDPhSM） thin film, which is difficult to make by conventional methods because of its insolubility and high melting point. TPDC was first evaporated on silicon substrates and then exposed to metal nanoparticles deposition by pulsed laser ablation prior to heat *** TPDC films with metal nanoparticles were heated in an electric furnace in air atmosphere to induce ring-opening polymerization of TPDC. The film thicknesses before and after polymerization were measured by a stylus profilometer. Since the polymerization process competes with re-evaporation of TPDC during the heating, the thickness ratio of the polymer to the monomer was defined as the polymerization efficiency, which depends greatly on the technology conditions. Therefore, a well trained radial base function neural network model was constructed to approach the complex nonlinear relationship. Moreover, a particle swarm algorithm was firstly introduced to search for an optimum technology directly from RBF neural network model. This ensures that the fabrication of thin film with appropriate properties using pulsed laser ablation requires no in-depth understanding of the entire behavior of the technology conditions.

关键词： nanocomposite thin film pulsed laser deposition(PLD) artificial neural net- works(ANN) particle swarm optimization (PSO)

Layer-by-layer assembly carbon nanotubes thin film based gas sensors for ammonia detection

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Science China(Information Sciences) 2011年第12期54卷 2700-2706页

作者： SUN Ping 1,2., JIANG YaDong 1* , XIE GuangZhong 1 , DU XiaoSong 1 , LI Xian 1 & HU Jia 1 1 School of Optoelectronic Information, State Key laboratory of Electronic thin {2. and Integrated Devices, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, China 2.Life and Physical Science College, Sichuan Agricultural University, Ya’an 62.014, China 1. School of Optoelectronic Information State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China (UESTC) Chengdu 610054 China2. Life and Physical Science College Sichuan Agricultural University Ya’an 625014 China

Single walled carbon nanotubes (SWNTs) were deposited on interdigital electrode (IDE) devices and quartz crystal microbalance (QCM) devices through layer-by-layer self-assembly method to fabricate resistance sensitive and mass sensitive gas sensors, respectively. Their ammonia gas-sensitive characteristics were detected at different temperature. It is revealed that the SWNTs based mass sensitive gas sensor has good sensing properties at room temperature. However, the SWNTs based resistance sensitive gas sensor has irreversible response for ammonia gas. When the temperature increases, the noise of SWNTs based mass sensitive gas sensor increases and the gas sensitive characteristic decreases. Meanwhile, the humidity effect is also discussed. It is important to optimize gas sensor by making it work at an appropriate external environment.

关键词： layer-by-layer self-assembly carbon nanotube gas sensor

Microwave Magnetic Properties of Laminates with thin FeCoBSi films

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 857-860页

作者：陆海鹏 State Key laboratory of Electronic thin {2. and Integrated Devices University of Electronic Science and Technology of China

The microwave permeability of laminated composites based on thin FeCoBSi films was under *** level of permeability increased with increasing of the ferromagnetic inclusions in the *** intrinsic permeability spectra of ferromagnetic inclusion are parametrically *** obtained parameters of magnetic resonance were specially *** avoid the effect of eddy current and to obtain large-volume fractions of ferromagnetic constituent,laminates consisting of alternating FeCoBSi/SiO2.multi-layers and mylar substrates were also *** the same volume fractions of ferromagnetic constituent （8.7%）,laminates based on multi-layered films are found to possess higher values of permeability than those based on one-layered films.

关键词： microwave permeability resonance frequency multi-layer magnetic films

Preparation of InSb nanocrystals embedded in SiO_2.thin films

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Chinese Science Bulletin 1998年第19期43卷 1610-1615页

作者： ZHU Kaigui 1, SHI Jianzhong 1, WEI Yanfeng 2.and ZHANG Lide 1 1. Institute of Solid State Physics, Chinese Academy of Science, Hefei 2.0031, China 2. State Key laboratory of Surface Physics, Fudan University, Shanghai 2.0433, China Institute of Solid State Physics Chinese Academy of Science Hefei China State Key laboratory of Surface Physics Fudan University Shanghai China

InSb nanocrystals embedded in SiO 2.thin films were prepared by rf magnetron cosputtering technique. THe observation by transmission electron microscope showed that InSb nanocrystals dispersed uniformly in SiO-2.matrices. InSb nanocrystals with different sizes can be obtained by changing the annealing condition. The average size of InSb nanocrystals depended on annealing temperature and time, but not on the t 1/3 rules. X-ray photoelectron spectroscopy and X-ray diffraction were also applied to the analyses of the composite thin films.

关键词： InSb nanocrystals radio-frequency sputtering quantum confinement.

Surface geometry and magnetism of Eu@C60 monolayer on Ag（111）

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Science China(Physics,Mechanics & Astronomy) 2012年第9期Mechanics & Astronomy) .卷 1589-1593页

作者： ZHAO ZhiWei 1,2.WANG Jing 1,2.& LIU Ying 1,2.1 Department of Physics,hebei Normal University,and hebei {2. thin Film laboratory,shijiazhuang 050016,China 2.National Key laboratory for Materials Simulation and Design,Beijing 100083,China

The surface geometry,electronic structure,and magnetism of Eu@C 60 monolayer absorbed on Ag(111) have been investigated within the framework of density functional *** Eu@C 60 monolayer has been constructed on Ag(111) substrate by one of the hexagon faces of C 60 downward and its mirror plane face parallel to Ag(111).The Eu@C 60 monolayer induces a reconstruction of the Ag(111) substrate and the perpendicular distance between the Eu@C 60 and Ag(111) surface is 2.06,being shorter than that between C 60 and Ag(111) surface by *** is no chemical bond formed between the Eu@C 60 and Ag(111),and only 0.55e transferred from Ag(111) to Eu@C 60.A large magnetic moment about 6.80 B per unit cell is found for Eu@C 60 /Ag(111) system.

关键词： endohedral fullerene two-dimensional C 60 domain magnetic organic molecule

A computer simulation of nucleation and growth of thin films

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Science China(Physics,Mechanics & Astronomy) 2004年第4期47卷 442-451页

作者： ZHENG Xiaoping1,ZHANG Peifeng2.HE Deyan2.LIU Jun2. MA Jiantai3 1. Key laboratory of Opto-Electronic Technology and Intelligent Control, Ministry of Education, Lanzhou Jiaotong University, Lanzhou 730070, China 2. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China 3. School of Chemistry and Chemistry Engineering, Lanzhou University, Lanzhou 730000, China 1. Key laboratory of Opto-Electronic Technology and Intelligent Control Ministry of Education Lanzhou Jiaotong University 730070 Lanzhou China 2. School of Physical Science and Technology Lanzhou University 730000 Lanzhou China 3. School of Chemistry and Chemistry Engineering Lanzhou University 730000 Lanzhou China

A three-dimensional kinetic Monte Carlo technique has been developed for simulating the nucleation and growth of thin films. This model involves incident atom attachment, surface diffusion of the atoms on the growing surface and atom detachment from the growing surface. It takes some new effects into account, such as a significant improvement in calculation of activation energy for the atom diffusion, which renders the model more reasonable. In addition three optimum temperatures and the consistency of their dependence on deposition rate have been found out; the dependence of the surface roughness and relative density on the deposition rate has been discussed; and the approximation of freezing neighbour atoms and periodic boundary conditions has been applied.

关键词： Monte Carlo, thin film, nucleation, surface roughness, relative density.