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

Origin of strain-induced resonances in flexible terahertz metamaterials

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)   

  1. 1. Department of Physics and Institute of Optics, Ningbo University, Ningbo 315211, China;
    2. Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    3. Department of Physics and RINS, Hanyang University, Seoul 133-791, Korea;
    4. Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
  • 收稿日期:2015-12-18 修回日期:2016-01-16 出版日期:2016-05-05 发布日期:2016-05-05
  • 通讯作者: Hua Xu, Yue-Hui Lu E-mail:xuhua@nbu.edu.cn;yhlu@nimte.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11204146 and 61574144), the Ningbo Key Laboratory of Silicon and Organic Thin Film Optoelectronic Technologies, China, the Program for Ningbo Municipal Science and Technology Innovative Research Team, China (Grant No. 2015B11002), and the K. C. Wong Magna Foundation in Ningbo University, China.

Origin of strain-induced resonances in flexible terahertz metamaterials

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   

  1. 1. Department of Physics and Institute of Optics, Ningbo University, Ningbo 315211, China;
    2. Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    3. Department of Physics and RINS, Hanyang University, Seoul 133-791, Korea;
    4. Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
  • Received:2015-12-18 Revised:2016-01-16 Online:2016-05-05 Published:2016-05-05
  • Contact: Hua Xu, Yue-Hui Lu E-mail:xuhua@nbu.edu.cn;yhlu@nimte.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11204146 and 61574144), the Ningbo Key Laboratory of Silicon and Organic Thin Film Optoelectronic Technologies, China, the Program for Ningbo Municipal Science and Technology Innovative Research Team, China (Grant No. 2015B11002), and the K. C. Wong Magna Foundation in Ningbo University, China.

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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.

关键词: flexible terahertz metamaterials, split ring resonator, strain, resonance

Abstract: 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.

Key words: flexible terahertz metamaterials, split ring resonator, strain, resonance

中图分类号:  (Multilayers; superlattices; photonic structures; metamaterials)

  • 78.67.Pt
42.60.Da (Resonators, cavities, amplifiers, arrays, and rings) 42.25.Bs (Wave propagation, transmission and absorption)