Active control of focal length and beam deflection in a metallic nano-slit array lens with multiple sources

Details Active control of focal length and beam deflection in a metallic nano-slit array lens with multiple sources Active control of focal length and beam deflection in a metallic nano-slit array lens with multiple sources

2009-10-21

arxiv.org/abs/0910.4039v1

Physics

Optics

4 pages, 5 figures

Scientific paper

We propose a surface plasmon-polariton based nano-rod array lens structure that incorporates two additional lateral input channels, with the ability to control the focal length and the deflection of the transmitted beam through the lens actively by the intensity of the channel sources. We demonstrate by numerical simulations that, applying the sources with the same intensity can change the focal point and the beam waist, whereas unequal intensities generate an asymmetric field profile in the nano-rod array inducing an off-axis beam deflection.

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