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Refraction Light Control by Constructing Output Interface Topography of Metal Waveguide Arrays |
| CAO Yong;WANG Pei;MIN Chang-Jun;LU Yong-Hua;YUAN Guang-Hui;MING Hai |
| Department of Physics, University of Science and Technology of China, Hefei 230026Anhui Key Laboratory Optoelectronic Science and Technology, Hefei 230026 |
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| Cite this article: |
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CAO Yong, WANG Pei, MIN Chang-Jun et al 2008 Chin. Phys. Lett. 25 2104-2106 |
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Abstract We investigate a nanoscale metal waveguide array (MWGA) structure and demonstrate that negative refraction effect exists from the visible to infrared frequency. Our numerical analysis shows that this effect is related to output
interface of MWGAs. Refraction light would have different directions on the gradient shaped output surface as a result of phase retardation control by waveguide thickness. Finite-difference time-domain analysis shows that more sharp superdiffraction limit imaging can be obtained by constructing convex-like output interface topography.
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| Keywords:
42.82.Et
78.67.-n
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Received: 10 February 2008
Published: 31 May 2008
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| PACS: |
42.82.Et
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(Waveguides, couplers, and arrays)
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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