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Applied Physics Letters / Volume 98 / Issue 12 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 98, 121114 (2011); http://dx.doi.org/10.1063/1.3571288 (3 pages)

Modulating the fundamental inductive-capacitive resonance in asymmetric double-split ring terahertz metamaterials

Yuanmu Yang1, Ran Huang2, Longqing Cong1, Zhihua Zhu1, Jianqiang Gu1, Zhen Tian1, Ranjan Singh2,3, Shuang Zhang4, Jiaguang Han1, and Weili Zhang1,2

1Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
2School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA
3Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
4School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom

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(Received 9 January 2011; accepted 7 March 2011; published online 24 March 2011)

We investigate resonant transmission of planar asymmetric metamaterials made from double split-ring resonators. As the symmetry of the unit cell resonator is broken by displacing the two gaps away from the center in opposite directions, a giant amplitude modulation is observed at the fundamental inductive-capacitive resonance due to strong polarization conversion. The modulation is nearly absent when the gaps are moved together in the same direction. This effect persists in metamaterials with different structural designs. These asymmetric metamaterials may open up new avenues toward the control of terahertz waves and the development of modulator and polarizer based terahertz devices.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

amplitude modulation, light polarisation, light transmission, metamaterials, microwave photonics, optical modulation, optical resonators

PACS

  • 42.70.Nq

    Other nonlinear optical materials; photorefractive and semiconductor materials

  • 42.79.-e

    Optical elements, devices, and systems

  • 84.40.-x

    Radiowave and microwave (including millimeter wave) technology

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3571288

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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