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	1. Study on the Growth of large size Nd:YAG laser crystal
	Quan Jiliang,Ma Decai,Wang Biao
	Physics 19 April 2017
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	Abstract:Neodymium-doped yttrium aluminum garnet (Nd:YAG) which is one of the most popular laser crystals has been widely used in solid state laser. Nd: YAG crystals with the diameter of 80 mm are grown by Czochralski (CZ) method. The up-weighing automatic diameter control (ADC) system is used to obtain the good quality of large diameter Nd:YAG crystals. Four common defects of Nd:YAG crystals are analyzed by adjusting the growth parameters and optimizing the thermal environment. Perfect Nd:YAG crystal with diameter of 80mm and lengh of 350 mm has been obtained successfully in this work.
	TO cite this article:Quan Jiliang,Ma Decai,Wang Biao. Study on the Growth of large size Nd:YAG laser crystal[OL].[19 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725714


	2. Analysis of a vortex beam in a non-coaxial optical focusing system
	Guoxuan Zhu,Yujie Chen,Yanfeng Zhang,Siyuan Yu
	Physics 18 April 2017
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	Abstract:In this paper, we analyze an optical beam carrying orbital angular momentum (OAM), i.e. a vortex beam, under the situation where a vortex phase plate (VPP) and a lens are used to generate and focus the vortex beam. A symmetric beam can be expanded into Fourier series in the azimuth frequency (l) space. We use this as a tool to analyze the non-coaxial system. The system efficiency, limited by the transmitting of ring-core fiber, against off-set distance is calculated. With such guidance, we successfully couple the vortex beam into a 1-km-long ring-core fiber.
	TO cite this article:Guoxuan Zhu,Yujie Chen,Yanfeng Zhang, et al. Analysis of a vortex beam in a non-coaxial optical focusing system[OL].[18 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725426

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	3. Selective growth of Ruddlesden-Popper strontium iridate epitaxial films by controlling oxygen partial pressure in pulsed laser deposition
	CHEN Binjie,YANG Nan,ZHONG Ni,TANG Xiaodong,YANG Pingxiong,XIANG Pinghua,DUAN Chungang
	Physics 17 April 2017
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	Abstract:The Ruddlesden-Popper (RP)-type strontium iridate (SrIrO3 and Sr2IrO4) epitaxial thin films are selectively grown from a single Sr2IrO4 target using pulsed laser deposition. The stabilization of the SrIrO3 and Sr2IrO4 phase is sensitive to oxygen partial pressure (PO2). Low laser fluence tends to expand the growth window of pure Sr2IrO4 films. The lower PO2 (≤2.6 Pa) is preferred for preparing Sr2IrO4 films, while the SrIrO3 phase forms at higher PO2 (≥6.5 Pa). The growth diagram for SrIrO3 and Sr2IrO4 films has been summarized, providing a powerful guideline for fabricating the epitaxial films of single RP-type strontium iridate phase.
	TO cite this article:CHEN Binjie,YANG Nan,ZHONG Ni, et al. Selective growth of Ruddlesden-Popper strontium iridate epitaxial films by controlling oxygen partial pressure in pulsed laser deposition[OL].[17 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725948


	4. First-Principle Investigations on the Solid Strengthening Mechanism of Si in Cr2AlC
	WangRuili,NiuYuan,Xiao Liou
	Physics 12 April 2017
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	Abstract:The first-principle method was used to investigate structural, elastic, and electronic properties of Cr2Al1-xSixC (x=0, 0.056, 0.111,0.167) to understand the solid strengthening mechanism. The calculated lattice constant (a and c) of Cr2AlC is in good agreement with the experimental results (within 2%), and the bulk modulus illustrates higher value after the incorporation of Si. Theoretical calculation of electronic properties reveals that the solid solution strengthening in Cr2Al1-xSixC is mainly caused by stronger hybridization bonds between Cr and Si atoms compared with those between Cr and Al atoms, leading to a denser electron charge distribution, higher bulk modulus, and also resulting in higher mechanical properties.
	TO cite this article:WangRuili,NiuYuan,Xiao Liou. First-Principle Investigations on the Solid Strengthening Mechanism of Si in Cr2AlC[OL].[12 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4724428


	5. The spinfoam propagator and the time-oriented boundary state
	DING You
	Physics 11 April 2017
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	Abstract:To test the semiclassical limit of Engle-Pereira-Rovelli-Livine spinfoam model in Lorentzian spacetime, a time-oriented semiclassical boundary state is introduced to calculate the correlation function in the Lorentzian Engle-Pereira-Rovelli-Livine spinfoam model. The resulting semiclassical correlation function is shown to match with the one in Regge calculus in a proper limit.
	TO cite this article:DING You. The spinfoam propagator and the time-oriented boundary state[OL].[11 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4724871


	6. Simplicity Constraints of Spinfoam Models
	DING You
	Physics 11 April 2017
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	Abstract:To give a mathematically rigorous path of obtaining Engle-Pereira-Rovelli-Livine spinfoam model, the implementation of simplicity constraints on the BF model is studied. In a simple way the boundary Hilbert space of the theory is defined; then it is shown directly that all constraints vanish on this space in a weak sense. It is pointed out that the general solution to this constraint (imposed weakly) depends on a quantum number in addition to those of loop quantum gravity. Finally, this construction is also generalized to Kami'nski-Kisielowski-Lewandowski version where the foam is not dual to a triangulation. It is shown that this theory can still be obtained as a constrained BF theory satisfying the simplicity constraint, now discretized on a general oriented 2-cell complex.
	TO cite this article:DING You. Simplicity Constraints of Spinfoam Models[OL].[11 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4724865


	7. Thermionic energy converter without cold reservoir based on self-organized thermal-electrical energy conversion
	Wang Zhengliang
	Physics 22 March 2017
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	Abstract:Although both heat engines and thermoelectric converters require cold reservoirs, the organization of heat energy into electrical energy can break this requirement. We show herein that thermionic emission from a solid emitter forms a dissipative structure. The solid emitter appears electropositive by losing electrons and the surroundings appear negative by gaining electrons, and the system self-organizes into an ordered electric double layer on the macro scale. To release into a circuit the energy stored in the electric field of the electric double layer, we do an experiment in which molten metal, which has no thermionic emission, serves as a collector and the solid emitter undergoes thermionic emission. When the solid emitter and the molten metal collector are maintained at the same temperature, the voltage and current output are stable. This demonstrates a new method based on self-organization to convert heat energy directly into electrical energy without requiring a cold reservoir. This thermionic energy converter should see use in diverse applications in the future.
	TO cite this article:Wang Zhengliang. Thermionic energy converter without cold reservoir based on self-organized thermal-electrical energy conversion[OL].[22 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4722465


	8. Design of direct-vision prisms with minimized spectral and spatial distortions for dispersive imaging spectrometers
	Mu Tingkui
	Physics 03 February 2017
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	Abstract:The spectral and spatial distortions, known as "smile" and "keystone", introduced by dispersive prisms in dispersive imaging spectrometers usually are nuisance for the accurate reconstruction of spectra and images. In addition to the software correction of distortion, the system designs, such as direct-vision compound prism, is also critical to reduce those distortions before corrections. In this paper, using vector ray tracing method, distortions and dispersive lengths are derived analytically for three-element or two-element compound prisms. The distortions are found to be the complex functions of the apex angles, the refractive indices and the incident vector on the first surface of the prisms, and relate to the focal length of imaging lens in the dispersive imaging spectrometer. The merit functions to optimize apex angles for the selected glasses at the fixed focal length over incident vectors are proposed. The presented method is useful for the designs of compound prisms in the dispersive imaging spectrometers with high accuracy.
	TO cite this article:Mu Tingkui. Design of direct-vision prisms with minimized spectral and spatial distortions for dispersive imaging spectrometers[OL].[ 3 February 2017] http://en.paper.edu.cn/en_releasepaper/content/4717708


	9. Constrained estimation for calibration of Stokes polarimeter in the presence of different noise
	Mu Tingkui
	Physics 17 January 2017
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	Abstract:During the calibration of a Stokes polarimeter, the noisy measurement data will degrade the accuracy of the estimated system matrix. In this paper, by taking into account the physical constraints in terms of radiometric calibration and system response, two constrained estimation methods are proposed to improve the calibration accuracy in the presence of signal-independent additive Gaussian noise, signal-dependent Poisson shot noise, or their combination. Both the numerical and experimental results show that the proposed constrained Maximum-likelihood (ML) estimation has the best accuracy, especially when the noisy measurement data have low signal-to-noise ratio, and the proposed constrained Least-Square (CLS) estimation is more effective than the conventional unconstrained Least-Square (ULS) estimation. The proposed estimation methods are useful for the calibration of the Stokes polarimeter with high accuracy.
	TO cite this article:Mu Tingkui. Constrained estimation for calibration of Stokes polarimeter in the presence of different noise[OL].[17 January 2017] http://en.paper.edu.cn/en_releasepaper/content/4717725


	10. A Novel Optical Temperature Sensor Based on Surface Plamon Polariton Resonator
	ZONG Yan,LANG Peilin,YU Li,DUAN Gaoyan,PAN Zijuan
	Physics 29 December 2016
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	Abstract:In this paper, we present a novel optical temperature sensor based on a nanoscale surface plasmon polariton (SPP) resonator. A bimetal layer is applied in the structure to detect the changes in temperature. The resonance wavelength of the SPP resonator shifts with the deformation of the bimetal layer. The effect of temperature on the refractive index of the material is also discussed. The finite element method(FEM) is employed to numerically calculate the reflectance spectra. To our knowledge, it is the first design of an SPP temperature sensor based on thermal deformation, and this structure may be applied in the future integrated optical circuit.
	TO cite this article:ZONG Yan,LANG Peilin,YU Li, et al. A Novel Optical Temperature Sensor Based on Surface Plamon Polariton Resonator[OL].[29 December 2016] http://en.paper.edu.cn/en_releasepaper/content/4715308

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