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Subwavelenth structures offer exciting new opportunities for integrated optics. Effective refractive index can be chosen from a broad range by lithographic patterning using just two materials. Many practical subwavelength engineered devices already demonstrated, with superior performance compared to their conventional counterparts and likely many more to come.
We report recent experimental results of two kinds of photodetectors developed in the framework of the European project HELIOS: InAlAs-InGaAs metal-semiconductor-metal photodetectors and germanium photodetectors.
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