Journal
RESULTS IN PHYSICS
Volume 23, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.rinp.2021.104049
Keywords
Metamaterial; Terahertz resonator; MEMS; Fano-resonance; Switch
Funding
- National Key Research and Development program of China [2019YFA0705004]
- National Natural Science Foundation of China [11690031]
- State Key Laboratory of Optoelectronic Materials and Technologies of Sun YatSen University
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The study introduces two tunable terahertz metamaterial resonators, TTM-1 and TTM-2, which can modulate resonant frequency by moving the metal frame, with tuning ranges of 0.19 THz and 0.79 THz respectively. The devices also demonstrate anti-inference capability by transversely moving the metal frame.
We present two types of tunable terahertz metamaterial (TTM) resonator. They are denoted as TTM-1 and TTM-2 for TTM resonators composed of a moveable metal frame carrying with inner disc and inner ring on Si substrates, respectively. The electromagnetic responses of TTM resonators are caused by the inductance-capacitance coupling effect between the incident THz wave into TTM structure. There is a Fano-resonance with a reflection intensity of 99% excited by electromagnetic wave within TTM-1 at 2.62 THz. By actively moving the metal frame in a specific direction, it enables a modulation of resonant frequency. The tuning ranges of TTM-1 and TTM-2 are 0.19 THz and 0.79 THz, respectively. Furthermore, TTM devices have the ability of anti-inference by moving metal frame transversely. It means TTM devices exhibit stable characteristic used in dynamic motion. Such designs of TTM configurations provide a high-efficiency THz resonator in the THz-waves applications such as filtering, switching, polarizing, sensing, and imaging fields.
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