Broadside Coupled Resonators for Real-time Tunable Metamaterials

ORAL

Abstract

Metamaterials based on broadside coupled split ring resonators (BC-SRRs) exhibit large tunability induced by modulating the coupling that arises from mutual capacitance and inductance. We design and fabricate a real-time tunable terahertz metamaterial by integrating BC-SRRs with comb-drive actuators, and characterize the dynamic response using terahertz time domain spectroscopy. The experimental results reveal that we can control the amplitude and phase of the transmission coefficient dynamically by driving the comb-drive actuators. We also observe remarkable modulation in the group delay. A two-port resonator model, derived from coupled mode theory, can analytically explain the experimental results and unveils the critical role of coupling between BC-SRRs. The results demonstrate that the propagation of electromagnetic waves can be dynamically controlled through modulating coupled resonators in metamaterials.

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Presenters

  • Xiaoguang Zhao

    Boston University, department of mechanical engineering, boston university

Authors

  • Xiaoguang Zhao

    Boston University, department of mechanical engineering, boston university

  • Jingdi Zhang

    Department of Physics, University of California San Diego, University of California, San Diego

  • Guangwu Duan

    Boston University

  • Jacob Schalch

    UC San Diego, University of California, San Diego, Department of Physics, University of California San Diego

  • Richard Douglas Averitt

    UC San Diego, University of California, San Diego, Department of Physics, University of California San Diego, Univ of California - San Diego

  • Xin Zhang

    Boston University, department of mechanical engineering, boston university