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Proceedings Paper

MEMS tunable terahertz metamaterials using out-of-plane mechanisms
Author(s): Yu-Sheng Lin; Prakash Pitchappa; Chong Pei Ho; Chengkuo Lee
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Paper Abstract

The tunable terahertz metamaterial (TTM) has attracted intense research interest, since the electromagnetic response of the metamaterial can be actively controlled through external stimulus, which is of great significance in real time applications. The active control of metamaterial characteristics is crucial in order to provide a flexible and versatile platform for mimicking fundamental physical effects. To realize the electromagnetic tunability, various approaches have been demonstrated to increase the flexibility in applications, such as changing the effective electromagnetic properties. Alternatively, MEMS-based techniques are well developed. The structural reconfiguration is a straightforward way to control the electromagnetic properties. The metamaterial properties can be directly modified by reconfiguring the unit cell which is the fundamental building block of metamaterials. Currently, our research works are focusing on MEMS-based TTM adopting stress-induced curved actuators (SICA) to adjust the resonant frequency of devices. Herein, the proposed TTM designs are double split-ring resonator (DSRR), electric split-ring resonator (eSRR), Omega-ring metamaterial (ORM), symmetric and asymmetric T-shape metamaterial (STM and ATM), respectively. We demonstrated these TTM can be active, continuous, and recoverable control the resonant frequency by using electrostatic or electrothermal actuation mechanism. Therefore, the TTM devices can be effectively used for sensors, optical switches, and filters applications.

Paper Details

Date Published: 4 March 2015
PDF: 12 pages
Proc. SPIE 9302, International Conference on Experimental Mechanics 2014, 93021J (4 March 2015); doi: 10.1117/12.2081180
Show Author Affiliations
Yu-Sheng Lin, National Univ. of Singapore (Singapore)
Prakash Pitchappa, National Univ. of Singapore (Singapore)
Chong Pei Ho, National Univ. of Singapore (Singapore)
Chengkuo Lee, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 9302:
International Conference on Experimental Mechanics 2014
Chenggen Quan; Kemao Qian; Anand Asundi; Fook Siong Chau, Editor(s)

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