Principle_of_operation Slot-waveguide

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e-field profile of 2d slot-waveguide. e-vector parallel y-axis



e-field distribution of 3d slot-waveguide. major e-field component parallel x-axis


given slot critical dimension (distance between high-index slabs or strips) comparable exponential decay length of fundamental eigenmode of guided-wave structure, resulting e-field normal high-index-contrast interfaces enhanced in slot , remains high across it. power density in slot higher in high-index regions. since wave propagation due total internal reflection, there no interference effect involved , slot-structure exhibits low wavelength sensitivity.








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