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Applied Physics Letters / Volume 96 / Issue 18 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 96, 181101 (2010); http://dx.doi.org/10.1063/1.3424793 (3 pages)

Parallel laser microfabrication of large-area asymmetric split ring resonator metamaterials and its structural tuning for terahertz resonance

Z. C. Chen1,2, M. H. Hong1,2, C. S. Lim2, N. R. Han1, L. P. Shi2, and T. C. Chong1,2

1Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576
2Data Storage Institute, Agency for Science, Technology and Research, DSI Building, 5 Engineering Drive 1, Singapore 117608

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(Received 24 December 2009; accepted 13 April 2010; published online 3 May 2010)

Large-area asymmetric split ring resonator (ASRR) arrays are fabricated by femtosecond laser microlens array lithography. The double square ASRR consists of two gaps at the outer edge. The resonance properties of this ASRR under structural symmetry breaking conditions are investigated in the terahertz region by changing gap size at one side. The resonance of the ASRR shows blueshift from 0.85 to 0.98 THz when the one gap size increases from 2 to 14 μm. Numerical simulations reveal that the electric field enhancement at the fixed gap increases from 152 to 206 times as the degree of asymmetry increases.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

high-speed optical techniques, laser arrays, lithography, metamaterials, microfabrication, microlenses, optical fabrication, spectral line shift, terahertz wave spectra

PACS

  • 42.82.Cr

    Fabrication techniques; lithography, pattern transfer

  • 42.70.-a

    Optical materials

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3424793

PUBLICATION DATA

ISSN

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

Publisher

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

For access to fully linked references, you need to log in.
    N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, Phys. Rev. Lett. 100, 207402 (2008).

    H. O. Moser, B. D. F. Casse, O. Wilhelmi, and B. T. Saw, Phys. Rev. Lett. 94, 063901 (2005).

    X. Xia, Y. Sun, H. Yang, H. Feng, L. Wang, and C. Gu, J. Appl. Phys. 104, 033505 (2008)JAPIAU000104000003033505000001.


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