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Advances in OptoElectronics
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Advances in OptoElectronics
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2012
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Article
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Fig 7
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Review Article
Nanocouplers for Infrared and Visible Light
Figure 7
Types of the direct couplers: (a) one waveguide next to or inside another, (b) end-fire coupling, (c) resonant stub between waveguides.
(a)
(b)
(c)