Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.4943974
Title: Active control of near-field coupling in conductively coupled microelectromechanical system metamaterial devices
Authors: Pitchappa, Prakash 
Manjappa, Manukumara
Ho, Chong Pei 
Qian, You 
Singh, Ranjan
Singh, Navab
Lee, Chengkuo 
Keywords: Science & Technology
Physical Sciences
Physics, Applied
Physics
ELECTROMAGNETICALLY-INDUCED-TRANSPARENCY
TERAHERTZ METAMATERIALS
MODULATOR
REGIME
ANALOG
Issue Date: 2016
Publisher: AMER INST PHYSICS
Citation: Pitchappa, Prakash, Manjappa, Manukumara, Ho, Chong Pei, Qian, You, Singh, Ranjan, Singh, Navab, Lee, Chengkuo (2016/03/14). Active control of near-field coupling in conductively coupled microelectromechanical system metamaterial devices. APPLIED PHYSICS LETTERS 108 (11). ScholarBank@NUS Repository. https://doi.org/10.1063/1.4943974
Abstract: We experimentally report a structurally reconfigurable metamaterial for active switching of near-field coupling in conductively coupled, orthogonally twisted split ring resonators (SRRs) operating in the terahertz spectral region. Out-of-plane reconfigurable microcantilevers integrated into the dark SRR geometry are used to provide active frequency tuning of dark SRR resonance. The geometrical parameters of individual SRRs are designed to have identical inductive-capacitive resonant frequency. This allows for the excitation of classical analogue of electromagnetically induced transparency (EIT) due to the strong conductive coupling between the SRRs. When the microcantilevers are curved up, the resonant frequency of dark SRR blue-shifts and the EIT peak is completely modulated while the SRRs are still conductively connected. EIT modulation contrast of ∼50% is experimentally achieved with actively switchable group delay of ∼2.5 ps. Electrical control, miniaturized size, and readily integrable fabrication process of the proposed structurally reconfigurable metamaterial make it an ideal candidate for the realization of various terahertz communication devices such as electrically controllable terahertz delay lines, buffers, and tunable data-rate channels.
Source Title: APPLIED PHYSICS LETTERS
URI: https://scholarbank.nus.edu.sg/handle/10635/188882
ISSN: 00036951
10773118
DOI: 10.1063/1.4943974
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