Free-space mode approximation for radiat
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Zi Hua Wang
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Article
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1998
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John Wiley and Sons
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English
β 82 KB
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Taking the symmetric slab wa¨eguide as an example, we show that radiation modes of a weakly guiding planar optical wa¨eguide can be approximated by the free-space modes; their field expressions and normalization constants are simple and physically understandable, and can be obtained directly without