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Title: Resonance enhancement of terahertz metamaterials by liquid crystals/indium tin oxide interfaces
Authors: Liu, Z.
Huang, C.-Y.
Liu, H.
Zhang, X.
Lee, C. 
Issue Date: 11-Mar-2013
Source: Liu, Z., Huang, C.-Y., Liu, H., Zhang, X., Lee, C. (2013-03-11). Resonance enhancement of terahertz metamaterials by liquid crystals/indium tin oxide interfaces. Optics Express 21 (5) : 6519-6525. ScholarBank@NUS Repository.
Abstract: This work fabricates a terahertz (THz) metamaterial device, whose structure consists of split ring resonator array/ plastic substrate/ Indium Tin Oxide (ITO) film/ liquid crystals/ ITO film/ plastic substrate. Experiment results show that the resonance of the THz metamaterial device can be enhanced as voltage is applied to the liquid crystals. The enhancement will be more significant as higher voltage applied. The resonance enhancement is attributed to the fact that the liquid crystals/ITO interfaces exhibit the large difference in terms of refractive index between the two materials in THz regime. The interfaces reflect the incident electromagnetic wave and cause the reflected wave to enhance the resonance of the metamaterials. As those frequency-tunable metamaterial devices show different resonant transmittance at different frequencies, which is undesired, the liquid crystals/ITO interfaces can improve those frequency-tunable metamaterial devices with a constant transmittance at different frequencies. © 2013 Optical Society of America.
Source Title: Optics Express
ISSN: 10944087
DOI: 10.1364/OE.21.006519
Appears in Collections:Staff Publications

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