A dynamically tunable terahertz metamaterial absorber based on an electrostatic MEMS actuator and electrical dipole resonator array. (6th January 2016)

• Record Type: Journal Article
• Authors: Hu, Fangrong; Xu, Ningning; Wang, Weiming; Wang, Yue'e; Zhang, Wentao; Han, Jiaguang; Zhang, Weili
• Is Part Of: Journal of micromechanics and microengineering. Volume 26:Number 2(2016:Feb.)
• Publication Date: 2016-01-06
• Subjects: tunable terahertz absorber -- metamaterial -- microelectromechanical systems (MEMS) -- electrical dipole resonator -- electrostatic actuator; Microelectromechanical systems -- Periodicals; Micromechanics -- Periodicals; 621.38105
• DOI: 10.1088/0960-1317/26/2/025006
• Languages: English
• ISSNs: 0960-1317

Abstract

Abstract: We experimentally demonstrate a dynamically tunable terahertz (THz) metamaterial absorber based on an electrostatic microelectromechanical systems (MEMS) actuator and electrical dipole resonator array. The absorption of the THz wave is mainly a result of the electrical dipole resonance, which shows a tunable performance on demand. By preforming the finite integral technique, we discovered that the central absorption frequency and the amplitude can be simultaneously tuned by the applied voltage U . Characterized by a white light interferometer and a THz time domain spectroscopy system, our THz absorber is measured to show a modulation of the central frequency and the amplitude to about 10% and 20%, respectively. The experimental results show good agreement with the simulation. This dynamically tunable absorber has potential applications on THz filters, modulators and controllers.