|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Arbitrary cylindrical vector beam generation enabled by polarization-selective Gouy phase shifter显示文摘Cylindrical vector beams(CVBs),which possess polarization distribution of rotational symmetry on the transverse plane,can be developed in many optical technologies.Conventional methods to generate CVBs contain redundant interferometers or need to switch among diverse elements,thus being inconvenient in applications containing multiple CVBs.Here we provide a passive polarization-selective device to substitute interferometers and simplify generation setup.It is accomplished by reversing topological charges of orbital angular momentum based on a polarization-selective Gouy phase.In the process,tunable input light is the only condition to generate a CVB with arbitrary topological charges.To cover both azimuthal and radial parameters of CVBs,we express the mapping between scalar Laguerre–Gaussian light on a basic Poincaré sphere and CVB on a high-order Poincaré sphere.The proposed device simplifies the generation of CVBs enormously and thus has potential in integrated devices for both quantum and classic optical experiments. | JUNLIANG JIA KEPENG ZHANG GUANGWEI HU MAPING HU TONG TONG QUANQUAN MU HONG GAO FULI LI CHENG-WEI QIU PEI ZHANG | 2021 | Photonics Research2021，9，6： | 4 |
| 2 | Active control of EIT-like response in a symmetry-broken metasurface with orthogonal electric dipolar resonators显示文摘The active control of electromagnetic response in metamaterial and mutual coupling between resonant building blocks is of fundamental importance in realizing high-quality metamaterials. In this work, we propose and experimentally demonstrate the tunabilities of symmetry-broken metasurfaces made of orthogonal electric dipolar resonators. The metasurface with vertical and horizontal wires is integrated with a PIN diode for active control.It is found that the electromagnetically induced transparency(EIT)-like spectrum appears due to the destructive or constructive interferences between the two electric dipolar modes when the structural symmetry broken is introduced to the metasurface. Different from previous works on the EIT-like effect, there is only electric dipole response in our metasuface. The microscopic response of the metasurface is numerically calculated to illustrate the mode coupling between the orthogonal electric dipolar resonators. By applying temporal coupled-mode theory,the interaction between the electromagnetic wave and the symmetry-broken metasurface is described, and the characteristic parameters of the resonator system, which determine the electromagnetic response of the metasurface, are acquired. | RUISHENG YANG QUANHONG FU YUANCHENG FAN WEIQI CAI KEPENG QIU WEIHONG ZHANG FULI ZHANG | 2019 | Photonics Research2019，7，9： | 3 |
| 3 | Optimization design of chiral hexagonal honeycombs with prescribed elastic properties under large deformation显示文摘Flexible chiral honeycomb cores generally exhibit nonlinear elastic properties due to large geometric deformation.The effective elastic moduli and Poisson's ratio typically vary with an increase in deformation.Here,the size and shape optimization of the chiral hexagonal honeycombs was performed to keep the Young's moduli and Poisson's ratio unchanged under large deformations.The size of the honeycomb unit cell and the position coordinates of the key points were defined simultaneously as design variables.The equivalent Young's modulus and Poisson's ratio of chiral honeycombs were calculated through geometric nonlinear analysis.The objective was to minimize the allowable tolerance between the prescribed and actual properties within the range of the target strain.A genetic algorithm was then adopted.The optimal results demonstrate that the chiral honeycombs can maintain effective elastic properties that do not vary under large deformation.These results are meaningful to morphing aircraft designs. | Kepeng QIU Ruoyao WANG Jihong ZHU Weihong ZHANG | 2020 | Chinese Journal of Aeronautics2020，33，3： | 3 |
| 4 | Anisotropic Total Variation Regularization Based NAS-RIF Blind Restoration Method for OCT Image显示文摘Based on anisotropic total variation regularization(ATVR), a nonnegativity and support constraints recursive inverse filtering(NAS-RIF) blind restoration method is proposed to enhance the quality of optical coherence tomography(OCT) image. First, ATVR is introduced into the cost function of NAS-RIF to improve the noise robustness and retain the details in the image.Since the split Bregman iterative is used to optimize the ATVR based cost function, the ATVR based NAS-RIF blind restoration method is then constructed. Furthermore, combined with the geometric nonlinear diffusion filter and the Poisson-distribution-based minimum error thresholding, the ATVR based NAS-RIF blind restoration method is used to realize the blind OCT image restoration. The experimental results demonstrate that the ATVR based NAS-RIF blind restoration method can successfully retain the details in the OCT images. In addition, the signal-to-noise ratio of the blind restored OCT images can be improved, along with the noise robustness. | Xuesong Fu Jianlin Wang Zhixiong Hu Yongqi Guo Kepeng Qiu Rutong Wang | 2020 | Journal of Beijing Institute of Technology2020，29，2： | 2 |
| 5 | Numerical Simulation of machined surface topography and roughness in milling process显示文摘 | Gao Tong Zhang Weihong Qiu Kepeng | | 0，，： | 1 |
| 6 | Topological de-sign of three-dimensional microstructure based on homogenization effective method 显示文摘 | Kepeng Qiu Weihong Zhang Shiping Sun | 2006 | Materials Science Forum2006，，： | 1 |
| 7 | Numerical prediction of static form errors in peripheral milling of thin- walled workpiece with irregular meshes 显示文摘 | Wan Min Zhang Weihong Qiu Kepeng | 2005 | Journal of Manufacturing Science and Engineering2005，127，： | 1 |
| 8 | Numerical prediction of static form errors in peripheral milling of thin-walled workpieces with irregular meshes显示文摘 | WAN Min ZHANG Weihong QIU Kepeng | 2005 | Journal of Manufacturing Science and Engineering2005，127，： | 1 |
| 9 | Numerical simulation of machined surface topography and roughness in milling process显示文摘 | GAO Tong ZHANG Weihong QIU Kepeng | 2006 | Journal of Manufacturing Science and Engineering2006，128，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员