中国物理B ›› 2016, Vol. 25 ›› Issue (5): 57802-057802.doi: 10.1088/1674-1056/25/5/057802
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Xiu-Yun Sun(孙秀云), Li-Ren Zheng(郑立人), Xiao-Ning Li(李枭宁), Hua Xu(徐华), Xian-Ting Liang(梁先庭), Xian-Peng Zhang(张贤鹏), Yue-Hui Lu(鲁越晖), Young-Pak Lee, Joo-Yull Rhee, Wei-Jie Song(宋伟杰)
Xiu-Yun Sun(孙秀云)1, Li-Ren Zheng(郑立人)2, Xiao-Ning Li(李枭宁)1, Hua Xu(徐华)1, Xian-Ting Liang(梁先庭)1, Xian-Peng Zhang(张贤鹏)2, Yue-Hui Lu(鲁越晖)2, Young-Pak Lee3, Joo-Yull Rhee4, Wei-Jie Song(宋伟杰)2
摘要: Two types of flexible terahertz metamaterials were fabricated on polyethylene naphthalate (PEN) substrates. The unit cell of one type consists of two identical split-ring resonators (SRRs) that are arranged face-to-face (i.e., FlexMetaF); the unit cell of the other type has nothing different but is arranged back-to-back (i.e., FlexMetaB). FlexMetaF and FlexMetaB illustrate the similar transmission dips under zero strain because the excitation of fundamental inductive-capacitive (LC) resonance is mainly dependent on the geometric structure of individual SRR. However, if a gradually variant strain is applied to bend FlexMetaF and FlexMetaB, the new resonant peaks appear: in the case of FlexMetaF, the peaks are located at the lower frequencies; in the case of FlexMetaB, the peaks appear at the frequencies adjacent to the LC resonance. The origin and evolution of strain-induced resonances are studied. The origin is ascribed to the detuning effect and the different responses to strain from FlexMetaF and FlexMetaB are associated with the coupling effect. These findings may improve the understanding on flexible terahertz metamaterials and benefit their applications in flexible or curved devices.
中图分类号: (Multilayers; superlattices; photonic structures; metamaterials)