Journal
APPLIED OPTICS
Volume 60, Issue 25, Pages 7530-7535Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.435569
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Funding
- National Natural Science Foundation of China [62001235, 61801225, 62004093]
- Jiangsu Provincial Natural Science Fund [BK20161526]
- Special Funds of the National Natural Science Foundation of China [11947101]
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The study introduces an electrically tunable superconducting device capable of switching THz wave transmission with high efficiency and good narrow-bandpass characteristics.
We experimentally demonstrate an electrically tunable superconducting device capable of switching the extraordinary terahertz (THz) transmission. The planar device consists of subwavelength hole arrays with real-time control capability. The maximum transmission coefficient at 0.33 THz is 0.98 and decreases to 0.17 when the applied voltage only increases to 1.3V. Arelative intensity modulation of 82.7% is observed, making this device an efficient THz switch. Additionally, this device exhibits good narrow-bandpass characteristics within 2 THz, which can be used as a frequency-selective component. This study offers an ideal tuning method and delivers a promising approach for designing active and miniaturized devices in THz cryogenic systems. (C) 2021 Optical Society of America
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