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Color-Sensitive Si-Photodiode Using Porous Silicon Interference FiltersKrüger, Michael; Berger, Michael Goetz; Marso, Michel; Reetz, Winfried; Eickhoff, Thomas; Loo, Roger; Vescan, Lili; Thönissen, Markus; Lüth, Hans; Arens-Fischer, Rüdiger; Hilbrich, Stefan; Theiss, Wolfgang · Japanese Journal of Applied Physics · 1997