Transmission properties of continuous terahertz waves based on metamaterials

Many fundamental progress and applications of metamaterials in millimeter wave or microwave have been found, but it is still important to design the metamaterials device in the terahertz frequency regime to fill THz-gap in future. Four subwavelength split-ring resonators(SRRs) were designed and fabricated in the terahertz frequency regime, and the transmission properties of four metamaterials was simulated by CST Studio, which can be used to analyze the resonance frequency. The power transmission properties of the devices in the frequency ranging from 1.04 THz to 4.25 THz were investigated by continuous waves terahertz lasers, the measured results revealed a total transmission peak at 2.52 THz and several local transmission peaks. The total transmission peak was related to the microstructures and electronic configurations of specific SRR arrays. In order to find a best SRR array for terahertz sensing with relatively high transmission efficiency, the normalized power transmission performances and sensing differences of four types of metamaterials microstructures were compared.