Title :
A tunable MEMS THz waveplate based on isotropicity dependent metamaterial
Author :
Zhang, Wensheng ; Zhu, W.M. ; Cai, H. ; Kropelnicki, Piotr ; Randles, A.B. ; Tang, M. ; Tanoto, H. ; Wu, Q.Y. ; Teng, J.H. ; Zhang, X.H. ; Kwong, D.L. ; Liu, A.Q.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
This paper reports a micromachined metamaterial which is tunable between anisotropic and isotropic state. The tuning rescales the metamaterial lattice constant instead of changing the element structure. It realizes a resonance independent change of transmission and tunes the transmitted phase of polarized THz wave. The transmission decreases from 15% to 0 for circularly polarized wave and tunes transmitted phase up to tens of degrees for linearly polarized wave. The tunable metamaterial can be potentially applied as a THz switch, tunable attenuator and waveplate.
Keywords :
electromagnetic wave polarisation; electromagnetic wave transmission; micromachining; micromechanical devices; submillimetre wave devices; terahertz metamaterials; terahertz wave devices; THz switch; THz wave polarization; anisotropic state; isotropic state; isotropicity dependent metamaterial; metamaterial lattice constant; micromachined metamaterial; phase transmitted tuning; tunable MEMS THz waveplate; tunable attenuator; Lattices; Metamaterials; Micromechanical devices; Polarization; Substrates; Tuning; MEMS; Metamaterial; THz; anisotropic; isotropic; polarization;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on
Conference_Location :
Barcelona
DOI :
10.1109/Transducers.2013.6626822