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We performed time-domain terahertz spectroscopy on flexible films coated by single-walled carbon nanotube. The films demonstrate good shielding of electromagnetic waves in the terahertz range, maintaining good transparency for visible light. The shielding efficiency can be engineered by the thickness control of the film and by the chemical treatments.
We report that the terahertz transparency occurs at the fundamental shape resonance of the rectangular holes regardless of the areal coverage. The funneling of energy at the fundamental resonance is also confirmed at the near-field.
We have achieved the nearly perfect transmission over 90% of random arrays that can be thought of as merely collective system of single rectangular holes with various length-to-width ratios and slits, using terahertz time domain spectroscopy. It is found that the terahertz transparency by the enhanced transmission can be experimentally realized even in the areal coverage less than 12% at the fundamental...
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