基于C型环结构的环偶极子超材料设计与仿真
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摘要
针对环偶极子现象在太赫兹波段的电磁特性,借助CST Microwave Studio软件进行模型设计与仿真。设计了基于C型环结构的太赫兹环偶极子超材料,研究C型环的半径尺寸和开口角度对环偶极子超材料表面电流、谐振点频率、透射率幅值及Q值的影响。研究发现:随着C型环半径尺寸及开口角度的增大,谐振频率分别出现红移与蓝移的现象。该模型为设计太赫兹波段的环偶极子提供了一种新方案,为设计偏振器、旋光计等太赫兹功能器件提供了参考。
In order to investigate the electromagnetic characteristics of the toroidal dipole phenomenon in the terahertz band,model design and simulation were carried out with the CST MICROWAVE STUDIO software. Terahertz toroidal dipole metamaterial based on C-type rings structure is designed. The effect of the radius size and opening angle of the C-type rings on the surface current,resonant frequency,transmission amplitude and Q value of the toroidal dipole metamaterial is investigated. It is found that the red shift and blue shift occur respectively with the increase of the radius size and opening angle of the C-type rings. This research provides a new scheme for designing terahertz band loop dipoles and can be used as a reference to design terahertz functional devices such as polarizers and polarimeters.
In order to investigate the electromagnetic characteristics of the toroidal dipole phenomenon in the terahertz band,model design and simulation were carried out with the CST MICROWAVE STUDIO software. Terahertz toroidal dipole metamaterial based on C-type rings structure is designed. The effect of the radius size and opening angle of the C-type rings on the surface current,resonant frequency,transmission amplitude and Q value of the toroidal dipole metamaterial is investigated. It is found that the red shift and blue shift occur respectively with the increase of the radius size and opening angle of the C-type rings. This research provides a new scheme for designing terahertz band loop dipoles and can be used as a reference to design terahertz functional devices such as polarizers and polarimeters.
引文
[1]李珍珍.基于磁环偶极子的双频高Q值电磁波超材料的研究设计[D].南京:南京航空航天大学,2016.
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[15]王爽,李泉,王晨.环偶极子研究现状与太赫兹频段应用展望[J].天津职业技术师范大学学报,2016,26(4):28-31.
[2]MARINOV K,BOARDMAN A D,FEDOTOV V A,et al.Toroidal metamaterial[J].New Journal of Physics,2007,9(9):324.
[3]KAELBERER T,FEDOTOV V A,PAPASIMAKIS N,et al.Toroidal dipolar response in a metamaterial[J].Science,2010,330(6010):1510-1512.
[4]郭林燕.环形偶极子超介质的实现与特性研究[D].武汉:华中师范大学,2016.
[5]GAO J,ZHANG K,YANG G,et al.A novel four-face polarization twister based on three-dimensional magnetic toroidal dipoles[J].IEEE Transactions on Magnetics,2014,50(1):4002104.
[6]DONG Z G,ZHU J,RHO J,et al.Optical toroidal dipolar response by an asymmetric double-bar metamaterial[J].Applied Physics Letters,2012,101:144105.
[7]FAN Y,WEI Z,LI H,et al.Low-loss and high-Q planar metamaterial with toroidal moment[J].Physical Review B,2013,87:115417.
[8]王胜磊.磁环形矩及其在开口谐振环的实现与特性研究[D].哈尔滨:哈尔滨工业大学,2014.
[9]王少宏,许景周,张希成,等.THz技术的应用及展望[J].物理,2001,30(10):612-615.
[10]郭静坤.碳系材料强电磁脉冲电磁屏蔽效能研究[D].西安:西安电子科技大学,2014.
[11]颜子瑜.单环结构金属共振环在太赫兹波段的吸收特性及其FDTD模拟[D].北京:首都师范大学,2009.
[12]LINDEN S,ENKRICH C,WEGENER M,et al.Magnetic response of metamaterials at 100 terahertz[J].Science,2004,306(5700):1351-1353.
[13]HORESTAN A K,DURAN S M,NAQUI J,et al.S-shaped complementary split ring resonators and their application to compact differential bandpass filters with common-mode suppression[J].IEEE Microwave and Wireless Componets Letters,2014,24(3):149-151.
[14]LI M,GUO L,DONG J,et al.An ultra-thin chiral metamaterial absorber with high selectivity for LCP and RCP waves[J].Journal of Physics D-Applied Physics,2014,47:185102.
[15]王爽,李泉,王晨.环偶极子研究现状与太赫兹频段应用展望[J].天津职业技术师范大学学报,2016,26(4):28-31.