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Resonant Transmission of Narrow Metallic Slit with Imperfect Inner Face |
| LIU Cheng;YAN Chang-Chun;LIU Ying;CHEN Hao |
| Department of Physics, Xuzhou Normal University, Xuzhou 221116 |
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| Cite this article: |
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LIU Cheng, YAN Chang-Chun, LIU Ying et al 2005 Chin. Phys. Lett. 22 1784-1786 |
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Abstract We numerically analyse the spectral properties of resonant transmission of light through a sub-wavelength metal slit with imperfect inner face. It is found that slight defects on the inner face of the slit can remarkably increase the spectrum shift of its resonant transmission, and this spectra-shift enhancement can be attributed to the induced evanescent waves by the defects. This finding reveals the relationship between the spectrum shift of resonant transmission and the evanescent waves and is potentially useful to explain some extraordinary phenomena in practical experiments, in which the metallic slit is always not ideally smooth.
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| Keywords:
78.20.Ci
42.79.Gn
42.82.Et
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Published: 01 July 2005
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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42.79.Gn
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(Optical waveguides and couplers)
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42.82.Et
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(Waveguides, couplers, and arrays)
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