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

fYear

2013

fDate

16-20 June 2013

Firstpage

538

Lastpage

541

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on

Conference_Location

Barcelona

Type

conf

DOI

10.1109/Transducers.2013.6626822

Filename

6626822