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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. Source


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. Source


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. Source


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. Source


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. Source

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