Shandong Provincial Key Laboratory of Optical Communication Science and Technology

Liaocheng, China

Shandong Provincial Key Laboratory of Optical Communication Science and Technology

Liaocheng, China
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Guo F.,Liaocheng University | Guo F.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Guo F.,University of Sichuan | Zhang H.,Sichuan University | And 3 more authors.
Chinese Physics B | Year: 2014

To probe the behavior of hydrogen bonds in solid energetic materials, we conduct ReaxFF and SCC-DFTB molecular dynamics simulations of crystalline TATB, RDX, and DATB. By comparing the intra- and inter-molecular hydrogen bonding rates, we find that the crystal structures are stabilized by inter-molecular hydrogen bond networks. Under high-pressure, the inter- and intra-molecular hydrogen bonds in solid TATB and DATB are nearly equivalent. The hydrogen bonds in solid TATB and DATB are much shorter than in solid RDX, which suggests strong hydrogen bond interactions existing in these energetic materials. Stretching of the C-H bond is observed in solid RDX, which may lead to further decomposition and even detonation. © 2014 Chinese Physical Society and IOP Publishing Ltd.


Yang B.,Beijing Institute of Technology | Yang B.,Liaocheng University | Yang B.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Wu T.,Beijing Institute of Technology | And 2 more authors.
Journal of Optics (United Kingdom) | Year: 2015

The optical absorption properties of graphene-wrapped dielectric particles have been investigated within the framework of the Mie theory. It is shown that subwavelength strong absorption in infrared spectra can take place in such systems due to the excitation of plasmon resonance in graphene. The absorption characteristics and efficiency are tunable by either varying the Fermi level and the damping constant of graphene, or by changing the size and the dielectric constant of small particles. These characteristics also depend on the separation distance between particles in the cluster. These extreme light resonances and absorptions in graphene-wrapped nanostructures have great potential for optoelectronic devices. © 2015 IOP Publishing Ltd.


Zou R.-B.,Liaocheng University | Zou R.-B.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Shi C.-C.,Beijing Institute of Technology
Advanced Materials Research | Year: 2014

A shearlets-based edge identification algorithem for the sea-sky in infrared image is proposed. The algorithem demonstrates the performance of edge detection based on shearlets, which is proper to use in infrared images. Simultaneously, with the advantage of edge geometric features provided by the shearlets, infrared image were extracted the direction information of edge of Infrared image, and classified. Simulation results conformed to the theory on edge detection based on shearlets. It drew the outline of edge for infrared image, provided the edge orientation feature and detected the sea-sky line. © (2014) Trans Tech Publications, Switzerland.


Deng A.,Liaocheng University | Deng A.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Zhang L.,Liaocheng University | Zhang L.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology
Finite Elements in Analysis and Design | Year: 2016

A novel nonconformal scheme for electromagnetic scattering analysis from perfect electric conducting (PEC) objects is presented in this paper. In this nonconformal scheme, the constant vector basis functions defined on a single triangle element are used as basis functions to solve the magnetic field integral equation (MFIE). Several commonly used basis functions for the MFIE are discussed and it is shown that the use of the new basis functions for the MFIE is reasonable. The construction of constant vector basis function as well as details for the calculation of the admittance matrix elements resulted from the use of method of moments (MoM) to the MFIE are given. It is shown that the use of the constant vector basis functions to the MFIE results in an efficient nonconformal scheme. Numerical results further validate the effectivity and efficiency of the proposed nonconformal scheme. © 2015 Published by Elsevier B.V.


Feng W.,Liaocheng University | Feng W.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Cui S.,Liaocheng University | Cui S.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | And 2 more authors.
Journal of Physics and Chemistry of Solids | Year: 2014

The structural stabilities and electronic properties of AlH3 under high pressure are investigated by using the plane-wave pseudopotential method. Our results demonstrate that the sequence of the pressure-induced phase transition is Fd3̄m(β)→cmcm(α′) →R3̄c(α)→Pnma(hp1)→Pm3̄n(hp2), and the transition pressures are 0.49, 0.91, 47, and 70 GPa, respectively. Im3̄m, Pnnm(γ) and P63/m structures are not stable in the 0-100 GPa. β, α′, α, and hp1 structures of AlH3 are nonmetals, while Pm3̄n structure of AlH3 is metallic, and the pressure-induced metallization is ascribed to phase transition under higher compression. © 2014 Published by Elsevier Ltd. All rights reserved.


Sheng S.-F.,Liaocheng University | Sheng S.-F.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology
Physica B: Condensed Matter | Year: 2013

We theoretically investigated the structural stability and electronic properties of ScVO4 by the first- principles pseudopotential method. The tetragonal zircon-type and scheelite-type structures, LaTaO4- type structure of ScVO4 have been considered. The calculations indicate that the LaTaO4-type phase is not stable in the pressure 0-100 GPa, and the structural phase transformation from zircon to scheelite-type structure occurs at 5.4 GPa. The band structure shows that zircon-type structure at zero pressure and scheelite-type structure at transition pressure have direct gaps of 2.58 eV and 2.35 eV, respectively. The detailed volume changes during the phase transition were analyzed. © 2013 Elsevier B.V. All rights reserved.


Sun G.-F.,Liaocheng University | Sun G.-F.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Wang Y.-L.,University of Chinese Academy of Sciences | Qian X.,Liaocheng University | And 2 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2014

THz time domain spectrum of Cr3+:LiSrAlF6 crystal in the range from 0.1 to 3 THz and the infrared spectrum in the range from 50 to 4000 cm-1 were measured at the room temperature and discussed. In the range from 0.2 to 1.5 THz, the absorption coefficient is less than 30 cm-1 and the values of the refractive index are 0.5 to 1.5. There is a band of the phonon absorption from 30 to 1238 cm-1 in the infrared spectrum, the transmittance is very little and nearly zero. The highest frequency of the longitudinal optical phonon model is about 1238 cm-1, and the force constant of Al-F ionic chemical bond from the highest frequency was calculated to be 5.0288 N·cm-1.


Zhang G.,Shandong University | Zhang G.,Liaocheng University | Zhang G.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Xie S.,Shandong University
Bulletin of the Korean Chemical Society | Year: 2014

In theoretical simulations of proton transfer in DNA, environmental factors nearly have not been considered. In our calculations, using QM/MM method on the basis of CP2K, proton transfer on adenine-thymine base pair is studied in water, at wide scope temperature, and under the external electric field. Our results indicate that the external electric field induces the proton transfer at room temperature, and its intensity and temperature have some effect on hole localization and proton transfer.


Zhang L.,Liaocheng University | Zhang L.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | Deng A.,Liaocheng University | Deng A.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology | And 2 more authors.
Optics Letters | Year: 2015

The contribution of the Green's function to the scattered magnetic field is not well expressed in the traditionally used magnetic field integral equation (MFIE) when the source and field points lie on the same plane. This decreases the accuracy of MFIE for objects with flat surfaces. To solve this problem, the normal magnetic field integral equation resulting from the use of the normal boundary condition is considered. It is then combined with the traditionally used MFIE into a new MFIE formulation, named the combined magnetic field integral equation (CMFIE). Through the use of an appropriate combination parameter, the omitted contribution of the Green's function to the scattered magnetic fields in the traditionally used MFIE can be recovered in this new CMFIE. Numerical results validate the analysis and show that the proposed MFIE formulation is much more accurate than the traditional one for small objects with flat surfaces. © 2015 Optical Society of America.


Wu L.,Liaocheng University | Wang M.,Liaocheng University | Wang M.,Shandong Provincial Key Laboratory of Optical Communication Science and Technology
Optik | Year: 2015

The structure of 1 × 2 type photonic crystal power splitter with ring resonators is designed in a two-dimension square-lattice dielectric-rod photonic crystal structure, and it consists of one input and two outputs. Its transmission performance is investigated by using the finite-difference time-domain (FDTD) method. The results show that the structure has high transmission efficiency in the third communication window (wavelength 1550 nm), can split pass band electromagnetic waves equally. It is compact with low loss and design flexibility in propagation direction of electromagnetic waves. © 2015 Elsevier GmbH. All rights reserved.

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