Enhanced mid-infrared transmission through nanoscale metallic coaxial-aperture arrays | Zendy

Wenjun Fan | Zendy; Shuang Zhang | Zendy; Kevin J. Malloy | Zendy; S. R. J. Brueck | Zendy

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Enhanced mid-infrared transmission through nanoscale metallic coaxial-aperture arrays

Author(s) -

Wenjun Fan,

Shuang Zhang,

Kevin J. Malloy,

S. R. J. Brueck

Publication year - 2005

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.004406

Subject(s) - coaxial , optics , materials science , transmission (telecommunications) , wavelength , nanophotonics , aperture (computer memory) , lithography , extraordinary optical transmission , optoelectronics , infrared , physics , surface plasmon , plasmon , surface plasmon polariton , telecommunications , computer science , acoustics

Using a single interferometric lithography patterning step along with self-aligned pattern-definition techniques, uniform, large-area metallic coaxial arrays with ~ 100-nm toroidal gaps are fabricated. Enhanced (5x) mid-infrared (4 mum) transmission through these sub-wavelength coaxial arrays is observed as compared with that through the same fractional opening area hole arrays as a result of the complex coaxial unit cell. Varying the coaxial dimensions shifts the resonance wavelength and impacts the maximum transmission; design rules are derived. The ability to control the transmission wavelength combined with dramatically enhanced transmission represent a promising path toward nanophotonic applications.

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