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	1. Microstructure Testing with Digital Holograph
	Qieni Lü,Baozhen Ge,Jin Zou
	Physics 15 January 2009
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	Abstract:An optical system of digital holography based on 4f system for microstructure measurement is studied in this paper. Fresnel off-axis hologram generated by a magnified image of microstructure is recorded with a CCD, and the magnified reconstructed image can be obtained by the angular spectrum method. The quantitative phase information of the microstructure under test is obtained. A theoretical analysis is performed in detail and the experiment done. And the experimental results are also given. The research shows that the method presented can be applied to micro-object imaging and its quantitative measurement.
	TO cite this article:Qieni Lü,Baozhen Ge,Jin Zou. Microstructure Testing with Digital Holograph[OL].[15 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27928


	2. Monte Carlo Simulation Study of SEM Images of Rough Surfaces
	Yonggang Li,Shifeng Mao,Huimin Li,Shuman Xiao,Zejun Ding
	Physics 06 January 2009
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	Abstract:In this paper, we have developed a Monte Carlo (MC) simulation method for scanning electron microscopy (SEM) images of rough surfaces. The roughness structure is constructed in a finite element triangulated mesh by using a Gaussian function to describe the distribution of amplitude of the random rough peaks. Further spatial subdividing can accelerate the calculation and improves MC simulation efficiency. The MC model is based on the using of the Mott cross section for description of the electron elastic scattering and the using of the full Penn algorithm in a dielectric functional approach to the electron inelastic scattering. This simulation relates directly a defined rough surface structure described by exact values of roughness parameters with the contrast observed in a SEM image, enabling the investigation of the influence of line edge roughness to the critical dimension (CD) metrology of MOS device by SEM. Example calculation of line images with sidewall roughness demonstrates that the present MC simulation method is useful for CD metrology of nanostructures by CD-SEM and, especially, for the linewidth measurement in the IC industry.
	TO cite this article:Yonggang Li,Shifeng Mao,Huimin Li, et al. Monte Carlo Simulation Study of SEM Images of Rough Surfaces[OL].[ 6 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27382

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	3. Monte Carlo simulation study of quasi-elastic electron scattering from an overlayer/substrate system
	Yonggang Li,Zengming Zhang,Shifeng Mao,Zejun Ding
	Physics 06 January 2009
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	Abstract:Recent experimental results have shown that the recoil energies of electrons elastically scattered by light and heavy atoms can be resolved for an energetic electron beam and at large scattering angles. Full understanding of the scattering processes involved is helpful to sample characterization, and, for providing more knowledge about electron inelastic mean free path. In this work we use a Monte Carlo simulation method to quantitatively study the energy shift, the Doppler broadening and especially the peak intensity ratio for an overlayer/substrate sample. Recoil energy in the electron elastic scattering events is calculated based on our previous Monte Carlo simulation model by taking account of the kinetic energy of atoms. An anisotropic distribution of the velocity direction of the atoms, the Maxwell-Boltzmann thermal energy distribution and also the multiple scattering of electrons are considered in the simulation. By introducing a polarized momentum a good agreement has been obtained on the position shift of quasi-elastic peak between the calculation and experiment. The calculation also shows a quantitative agreement with the experimental results on the peak intensity ratio between different elements for a Ge/C overlayer sample. It is illustrated that the multiple scattering effect is remarkable for a high energy beam.
	TO cite this article:Yonggang Li,Zengming Zhang,Shifeng Mao, et al. Monte Carlo simulation study of quasi-elastic electron scattering from an overlayer/substrate system[OL].[ 6 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27366


	4. Size- and composition-induced band-gap expansion of nanostructured compound semiconductors
	Sun Changqing,Y. Wang,G. Ouyang,L. L. Wang
	Physics 16 December 2008
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	Abstract:We have investigated the joint effect of size and composition-induced band-gap change of semiconductive nanocompounds from the recently-developed bond-order-length-strength (BOLS) correlation mechanism using the approach of local bond average (LBA). An analytical solution has been developed to connect the band-gap energy with the bonding identities of the nanocompounds. Agreement between model predictions with the available experimental measurements of band-gap change of II-VI semiconductor nanocompounds showed that both the particle size and the composition with alloying effect can be used as factors tuning the band-gap energy, suggesting an effective way to realize the desirable properties of semiconductive nanocompounds.
	TO cite this article:Sun Changqing,Y. Wang,G. Ouyang, et al. Size- and composition-induced band-gap expansion of nanostructured compound semiconductors[OL].[16 December 2008] http://en.paper.edu.cn/en_releasepaper/content/26614


	5. Local bond average for the size and temperature dependence of elastic and vibronic properties of nanostructures
	Sun Changqing,Cher Ming Tan,Shanzhong Wang
	Physics 18 November 2008
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	Abstract:With the miniaturization of a solid down to nanometers scale, the mechanical and optical properties of such nanomaterials are different from that of their corresponding bulk materials. A systematic understanding of the atomic origin of the unusual behavior of mechanical and optical properties of a nanosolid is presented here towards the predictions for design and controllable growth of nanosctructured materials. The Local Bond Average (LBA) approximation and bond-order-length-strength (BOLS) correlation mechanism in size, temperature and pressure domain has been developed, which enables the tunability of various measurable properties, such as elastic constants, optical phonon frequency shift. Agreement between predictions and observations reveal that the shortened and strengthened surface bonds are responsible for the observed size dependent change of material properties, while the temperature induced bond expansion and weakening are the physical origin for the temperature dependent change of measurable material properties.
	TO cite this article:Sun Changqing,Cher Ming Tan,Shanzhong Wang. Local bond average for the size and temperature dependence of elastic and vibronic properties of nanostructures[OL].[18 November 2008] http://en.paper.edu.cn/en_releasepaper/content/25820


	6. Effect of Force on Photon
	C.T.Zhang,Yuan Zhang
	Physics 17 October 2008
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	Abstract:By analyzing the effect of force on photon, I have worked out a formula on the relation between force and light’s frequency that we called force-frequency formula, which may expand and perfect the application of Newton’s Second Law in optics. And from this formula, we can understand light as well as the relation between light and material more profoundly. By using force-frequency formula, we got red shift and blue shift formula of light under action of force and the relationship between light and black hole. And further more, we got a conditional formula of black hole. Finally, we have concluded: there is no black hole but only black body, etc.
	TO cite this article:C.T.Zhang,Yuan Zhang. Effect of Force on Photon[OL].[17 October 2008] http://en.paper.edu.cn/en_releasepaper/content/24918


	7. Phase Separation in two-Species Atomic Bose-Einstein Condensate with Interspecies Feshbach Resonance
	Lu Zhou,Jing Qian,Han Pu,weiping zhang,Hong Y. Ling
	Physics 15 October 2008
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	Abstract:We consider a mixture of two-species atomic Bose-Einstein codensates coupled to a bound molecular state at zero temperature via interspecies Feshbach resonance. The interspecies Feshbach coupling precludes the possibility of doubly mixed phases while enables not only the pure molecular superfluid but also the pure atomic superfluids to exist as distinct phases. We show that this system is able to support a rich set of phase separations, including that between two distinct mixed atom-molecule phases. We pay particular attention to the effects of the Feschbach coupling and the particle collisions on the miscibility of this multi-component condensate system.
	TO cite this article:Lu Zhou,Jing Qian,Han Pu, et al. Phase Separation in two-Species Atomic Bose-Einstein Condensate with Interspecies Feshbach Resonance[OL].[15 October 2008] http://en.paper.edu.cn/en_releasepaper/content/24823


	8. Transferring single cesium atoms between a magneto-optical trap and a far-off-resonance optical dipole trap
	He Jun,Wang Jing,Yang Baodong,Zhao Jiangyan,Zhang Tiancai,Wang Junmin
	Physics 10 October 2008
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	Abstract:Based on our work of trapping single cesium atoms in a large-magnetic-gradient vapour-cell magneto-optical trap (MOT), a remarkable improvement in the signal-to-noise ratio (SNR) has been made. Also a far-off-resonance optical dipole trap (FORT) formed by a strongly-focused 1064nm single frequency Nd:YVO4 laser beam is introduced. One cesium atom is prepared in the MOT, and then the atom can be transferred successfully between the MOT and the FORT which is overlapped with the MOT. Utilizing the effective transferring, the lifetime of trapped single atoms in the FORT is measured, and it is 6.9 s ± 0.3 s. It provides a system allowing us to manipulate the atomic qubit coherently.
	TO cite this article:He Jun,Wang Jing,Yang Baodong, et al. Transferring single cesium atoms between a magneto-optical trap and a far-off-resonance optical dipole trap[OL].[10 October 2008] http://en.paper.edu.cn/en_releasepaper/content/24702


	9. Theoretical study of EPR spectra and local structure of trigonal [Cr(H2O)6]3+ complex in GASH:Cr3+ and AlCl3•6H2O:Cr3+ systems at different temperatures
	Li Yan-Fang,Kuang Xiao-Yu
	Physics 26 September 2008
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	Abstract:The electron paramagnetic resonance (EPR) parameters and local structure of the octahedral [Cr(H2O)6]3+ complex for Cr3+ doped in GASH and AlCl36H2O crystals with trigonal symmetry have been studied on the basis of the 120120 complete energy matrices, respectively. By simulating the EPR and optical spectra, the local structure distortion parameters △R = 0.0765-0.0803 Å, △Z = 0.0453-0.0462 Å for Cr3+ in GASH (I); △R = 0.0716-0.0754 Å, △Z = 0.0358-0.0374 Å for Cr3+ in GASH (II); and △R = 0.0725-0.0775 Å, △θ= 0.0903-0.0859 for Cr3+ in AlCl3•6H2O are determined in the temperature range 4.2-297 K. The calculated results show that the local structure of [Cr(H2O)6]3+ octahedron exhibits an elongation distortion. Moreover, the temperature dependence of the local structure has been discussed and the interrelation between the g-factors and orbit reduction factor K has also been studied.
	TO cite this article:Li Yan-Fang,Kuang Xiao-Yu. Theoretical study of EPR spectra and local structure of trigonal [Cr(H2O)6]3+ complex in GASH:Cr3+ and AlCl3•6H2O:Cr3+ systems at different temperatures[OL].[26 September 2008] http://en.paper.edu.cn/en_releasepaper/content/24413


	10. Swap of Quantum Information between Two-End States in an Open Ferromagnetic Spin Chain
	Tao Song,Shiqun Zhu,Xiang Hao
	Physics 16 September 2008
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	Abstract:The bidirectional transfer of quantum information can be realized in an open Heisenberg ferromagnetic spin chain in a magnetic field. The information is encoded in the population distribution of the states at two end spins. The fidelity for swapping the information is used to evaluate the effective transmission of the population. It is found that the evolution of the fidelity shows a periodical behavior. The period is increased with increasing the length of the chain and the magnetic field while it decreases with increasing the coupling strength.
	TO cite this article:Tao Song,Shiqun Zhu,Xiang Hao. Swap of Quantum Information between Two-End States in an Open Ferromagnetic Spin Chain[OL].[16 September 2008] http://en.paper.edu.cn/en_releasepaper/content/24076

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